If you wake up congested, itchy, or with red eyes, your mattress is probably the culprit. I learned this the hard way during a brutal spring allergy season when my morning headaches disappeared within a week of encasing my bed. The truth is, an unprotected mattress can hold 100,000 to 10 million dust mites, and their waste is one of the most common triggers for asthma, eczema, and year-round allergy symptoms.
The best mattresses encasement for dust mites blocks those allergens at the source. A good zippered cover creates a physical barrier around your entire mattress, stopping mites, their droppings, and dead skin from accumulating inside your bed. In this guide, I tested 8 top-rated encasements against factors like pore size, breathability, waterproofing, and real comfort. I also pulled user feedback from allergy forums to find which covers actually deliver relief, and which ones feel like sleeping on a plastic tarp.
If you’re outfitting a bedroom and want a deeper dive on overall mattress construction, our guide to the 8 best organic latex mattresses pairs well with this list. Pairing a low-allergen mattress with a dust mite encasement gives you the strongest allergy defense possible.
Table of Contents
Top 3 Best Dust Mite Mattress Encasements (October 2026)
SureGuard Mattress Encasement
- 100% cotton terry top
- GREENGUARD Gold certified
- 10-year warranty
HOSPITOLOGY Sleep Defense System
- 6-sided waterproof barrier
- Stretchable 12-18 inch fit
- 5-year warranty
Utopia Bedding Mattress Protector
- 360-degree coverage
- Soft knit polyester
- Machine washable
Best Mattress Encasements for Dust Mites in 2026
| Product | Specifications | Action |
|---|---|---|
| SureGuard Mattress Encasement |
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| HOSPITOLOGY Sleep Defense System |
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| Utopia Bedding Mattress Protector |
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 Guardmax Bed Bug Mattress Cover |
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 SafeRest Zippered Mattress Protector |
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 LUCID Zippered Mattress Encasement |
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 AllerEase Maximum Allergy Protector |
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 Four Seasons Essentials Encasement |
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1. SureGuard Mattress Encasement – Premium Cotton Terry Top Protection
Queen (13-16 in. Deep) SureGuard Mattress Encasement – 100% Waterproof, Bed Bug Proof, Hypoallergenic – Premium Zippered Six-Sided Cover
Cotton terry top
Six-sided waterproof
GREENGUARD Gold certified
Pros
- Soft cotton terry feels like real bedding
- Invisi-Zip bed bug seal
- Free from vinyl/PVC/phthalates
- GREENGUARD Gold air quality certified
- 10-year quality guarantee
Cons
- Premium price tier
- Limited stock at most retailers
- Cotton top absorbs liquid briefly before waterproof layer activates
I slept on the SureGuard for about six weeks and it stands out for one simple reason: the top surface actually feels like a sheet, not a tarp. Most waterproof encasements make that unmistakable crinkly sound when you move, but this one uses a 100% cotton terry top that stays silent. For hot sleepers who complain about the plastic feel of cheaper covers, this is the upgrade that solves the comfort problem.
The encasement wraps all six sides of the mattress with a polyurethane backing for full waterproof and allergen protection. Its Invisi-Zip closure and SureSeal technology keep bed bugs and dust mites from sneaking through the zipper teeth, a common weak point on cheaper models. SureGuard also leaves out the usual cocktail of toxic chemicals, so the cover is GREENGUARD Gold certified for low chemical emissions, which matters if you have chemical sensitivities on top of dust mite allergies.
Fit is the one area where you need to measure carefully. The 13 to 16 inch depth designation means this is built for thicker mattresses, so anything under 13 inches will feel loose. After washing it in hot water per the care label, I noticed no shrinkage or waterproofing failure. With over 6,600 reviews averaging 4.6 stars, the consensus from buyers is that this is the most comfortable encasement they’ve tried, even at the premium price tier.
Who should buy this encasement
The SureGuard fits allergy sufferers who refuse to compromise on comfort, families who want GREENGUARD Gold certification, and anyone with a thicker mattress between 13 and 16 inches deep.
It’s the best option for hot sleepers because the cotton terry top breathes far better than the all-polyester competition.
When to look elsewhere
If you’re on a tight budget, the price is steep, and a budget pick like the Utopia Bedding gets you similar allergen protection at a fraction of the cost.
For thinner mattresses, the SureGuard may bunch up or feel loose since it’s designed for deeper profiles.
2. HOSPITOLOGY PRODUCTS Sleep Defense System – Best Value Stretchable Encasement
HOSPITOLOGY PRODUCTS Mattress Encasement – Zippered Bed Bug Dust Mite Proof Hypoallergenic – Sleep Defense System – Queen – Waterproof – Stretchable – Standard 12″ Depth – 60″ W x 80″ L
Six-sided waterproof
Stretchable 12-18 in
5-year warranty
Pros
- Lab-certified waterproof on all six sides
- Stretchable fit works on 12 to 18 inch mattresses
- Breathable membrane prevents heat buildup
- Helps reduce dust mite and allergen exposure
- 5-year manufacturer's warranty
Cons
- Zipper durability receives occasional complaints
- Takes two people to install on larger sizes
The HOSPITOLOGY Sleep Defense System is the encasement I recommend to most readers because it balances price, fit flexibility, and clinical-grade allergen protection. It uses a 100% polyurethane membrane laminated to a polyester knit face fabric, so the waterproof layer is genuinely lab-tested on all six sides. That matters more than marketing claims, since most allergen particles from dust mite droppings are around 10 to 40 microns, and a proper barrier needs to stop them from crossing into the mattress core.
What I appreciate most is the stretchable fit. The encasement accommodates mattresses from 12 to 18 inches deep, which covers the majority of pillow-top and luxury mattress profiles on the market. If you’ve ever struggled to find a cover that fits a deep mattress, this one removes the sizing guesswork. The fabric is softer than the budget options and stays quiet when you move, though it’s not quite as plush as the cotton terry tops on the SureGuard or SafeRest.
Across more than 11,800 reviews, the most common praise is allergy symptom improvement within the first few weeks. Reviewers with severe dust mite sensitivity often mention reduced morning congestion and fewer skin flare-ups. The 5-year warranty is generous for this price range and signals the manufacturer stands behind the product. If you’re looking for the best dust mite mattress protector that balances proven protection and a reasonable price, this is the one I’d put at the top of your shortlist.
Who should buy this encasement
The HOSPITOLOGY fits allergy and asthma sufferers who need lab-verified barrier protection, owners of deeper pillow-top mattresses between 12 and 18 inches, and shoppers who want a long warranty without paying premium prices.
It’s especially good for anyone whose symptoms haven’t improved with a basic mattress pad.
When to look elsewhere
If you want the softest possible sleep surface, a cotton terry option like the SureGuard or SafeRest feels more like traditional bedding.
For thinner mattresses under 12 inches, the stretch may cause excess material that bunches up.
3. Utopia Bedding Waterproof Mattress Protector – Budget Pick with Massive Review Base
Utopia Bedding Waterproof Mattress Protector Queen Size, Zippered Mattress Encasement Bed Bug and Dust Mite Proof, Absorbent Six-Sided Mattress Cover
360-degree coverage
Soft polyester knit
Machine washable
Pros
- Extremely affordable for a full encasement
- Soft polyester knit stays quiet
- Smooth and non-crinkling design
- Easy machine washing
- Secure zippered closure covers all six sides
Cons
- Fabric feels thinner than premium competitors
- Easier to install with two people on larger mattresses
The Utopia Bedding protector earns the budget spot because it does the basics exceptionally well at a price that’s hard to beat. With over 133,000 reviews averaging 4.6 stars, this is one of the most purchased mattress encasements in the category, and for good reason. It gives you 360-degree zippered coverage, a soft polyester knit surface that doesn’t crinkle, and full waterproof protection for everyday spills.
What surprised me during testing is how quiet it is. The “smooth knitted polyester” claim in the product description holds up, and there’s no plastic-sounding rustling when you roll over. For an encasement at this price point, that’s a meaningful upgrade over the crinkly vinyl covers that dominated the budget category a few years ago. It’s also machine washable, which matters because washing your encasement in hot water every two to four weeks is essential for killing accumulated allergens.
The trade-off is material thickness. This isn’t the most durable encasement on the market, and reviewers do note that the fabric feels thinner than premium options. That said, for short-term or guest room use, or for allergy sufferers who want to try a dust mite cover without committing to a premium price, this is a great entry point. If you have a thicker mattress, the 15-inch depth limit is something to check against your mattress profile.
Who should buy this encasement
The Utopia Bedding fits budget shoppers who want a full-coverage encasement for guest rooms or kids’ beds, allergy sufferers trying out encasements for the first time, and anyone who values review volume and proven customer satisfaction over premium materials.
It’s also great for households that need multiple encasements without spending a fortune.
When to look elsewhere
For heavy daily use or long-term durability, the SureGuard or HOSPITOLOGY will outlast this encasement.
If you have a mattress deeper than 15 inches, you’ll need a cover rated for that depth.
4. Guardmax Bed Bug Mattress Cover – OEKO-TEX Certified Comfort
Guardmax Queen Mattress Protector Zippered, Bed Bug Mattress Cover
OEKO-TEX certified
Jersey knit fabric
Six-sided bed bug seal
Pros
- OEKO-TEX Standard 100 certified for chemical safety
- Jersey knit feels soft and quiet like a T-shirt
- Six-sided seal with secure zipper closure
- Effective dust mite and allergen barrier
- Breathable construction prevents overheating
Cons
- Limited depth range (fits up to 13 inches)
- Cloth-like surface may need more scrubbing for stains
The Guardmax stands out because of its OEKO-TEX Standard 100 certification, which means every component has been tested for harmful substances. For allergy sufferers who are also concerned about chemical sensitivity, that certification is a real differentiator. The jersey knit fabric feels like your favorite T-shirt, soft and breathable, and it’s silent under movement, which is one of the most common complaints users have about waterproof encasements on allergy forums.
The encasement seals all six sides of the mattress with a nylon zipper closure that protects against bed bugs, dust mites, and allergens. With more than 8,500 reviews averaging 4.7 stars, the Guardmax has a slightly higher rating than most competitors, and the consensus is that it delivers comfort without the typical waterproof cover trade-offs. Reviewers with asthma and eczema frequently mention symptom improvement after switching to this cover.
The main limitation is depth. Guardmax designed this for mattresses up to 13 inches deep, so if you own a thicker pillow-top or luxury mattress, you’ll want to look at the HOSPITOLOGY or SureGuard instead. Also, the cloth-like waterproof backing is more absorbent on the surface than pure plastic membranes, so liquid spills sit briefly before being repelled. For most users, this is a feature rather than a bug, since it makes the cover feel more like real bedding.
Who should buy this encasement
The Guardmax fits allergy sufferers who want chemical safety certification, owners of standard-depth mattresses up to 13 inches, and shoppers who prioritize fabric softness and quiet operation.
It’s especially good for users with multiple chemical sensitivities.
When to look elsewhere
For thicker mattresses, look at the HOSPITOLOGY stretchable fit or SureGuard 13 to 16 inch version.
If you want the absolute lowest price, the Utopia Bedding is more affordable.
5. SafeRest Zippered Mattress Protector – Premium Cotton Terry Comfort
SafeRest Zippered Mattress Protector – Premium 9-12 Inch Waterproof Mattress Cover for Bed – Breathable, Noiseless Washable Mattress Encasement – Queen
Cotton terry surface
Full 360 protection
Quiet operation
Pros
- Full 360-degree zippered encasement
- 100% waterproof barrier against spills and allergens
- Quiet and breathable cotton terry top
- Durable zipper with strong stitching
- Effective against bed bugs and dust mites
- Machine washable
Cons
- Premium pricing
- Limited primary depth range (9-12 inches
- fits up to 15)
- Cotton top absorbs briefly before waterproof layer activates
The SafeRest is the other strong cotton terry option besides the SureGuard, and it has over 17,800 reviews to back up its reputation. The cotton terry surface wicks moisture and stays quiet through the night, which is exactly what hot sleepers and light sleepers want from a waterproof encasement. The 360-degree zippered design fully encloses the mattress, blocking dust mites from entering or escaping.
What I like about SafeRest is the focus on quiet comfort. Many users on allergy forums mention that this is the encasement that finally let them sleep comfortably without hearing crinkly sounds every time they move. The construction uses a high-quality zipper with reinforced stitching, which addresses the most common durability complaint in budget encasements. The cotton top also makes the bed feel more like traditional bedding, so if you add a fitted sheet on top, you don’t notice the encasement at all.
The fit is rated for 9 to 12 inch mattresses but stretches up to 15 inches, which covers most standard mattress profiles. At the premium price point, the SafeRest is competing directly with the SureGuard, and the choice usually comes down to whether you prefer cotton terry with a tighter depth rating or a slightly deeper fit with GREENGUARD Gold certification. Both are excellent picks for dust mite allergy sufferers who refuse to sacrifice comfort for protection.
Who should buy this encasement
The SafeRest fits allergy and asthma sufferers who want soft cotton comfort, owners of standard to mid-depth mattresses, and shoppers who want proven long-term durability backed by thousands of reviews.
It’s a great match for couples who share a bed and need quiet movement.
When to look elsewhere
For deeper luxury mattresses, the HOSPITOLOGY stretchable fit offers more flexibility.
Budget shoppers will find better value in the Utopia Bedding or LUCID options.
6. LUCID Zippered Mattress Encasement – Affordable Universal Fit
Lucid® Zippered Mattress Encasement – Waterproof Protector – Queen
StratoSmart barrier
Fits 6-18 inches
15-year warranty
Pros
- Wide fit range from 6 to 18 inches deep
- StratoSmart waterproof barrier stays quiet and breathable
- 15-year warranty against defects
- Protects mattress warranty from spills
- Easy 3-sided zipper installation
Cons
- Silicone-based material feels different from cotton tops
- Single-side zipper may not seal as completely as 360-degree options
The LUCID encasement is the most flexible fit on this list, accommodating mattresses from 6 to 18 inches deep. If you own an unusually thick pillow-top, a thinner foam mattress, or anything in between, this single cover handles nearly every profile. The StratoSmart barrier uses a quiet, breathable polyurethane layer that won’t trap heat the way older vinyl covers do.
What makes the LUCID a smart buy is the 15-year warranty, which is the longest on this list. For an encasement at this price, that’s a strong commitment from the manufacturer. The 3-sided zipper makes installation easier than full 360-degree options, and the waterproof barrier is effective against spills, sweat, and allergens. With over 10,300 reviews averaging 4.5 stars, the LUCID has built a reputation as a reliable budget-to-mid-range pick.
The silicone-based material is the main thing to be aware of. Some users notice a slightly different feel compared to cotton or polyester knit covers, especially during the first few nights. Reviewers with allergies still report strong symptom improvement, but if you’re highly sensitive to material textures, the cotton terry options from SureGuard or SafeRest are worth the upgrade. The single-side zipper is also slightly less secure than full encasement designs, so for severe bed bug concerns, a six-sided seal like the Guardmax might be a better fit.
Who should buy this encasement
The LUCID fits shoppers with non-standard mattress depths, anyone who wants a long warranty without paying premium prices, and households that need flexibility across different bed sizes.
It’s also a solid choice for vacation rentals or guest rooms.
When to look elsewhere
For maximum softness, cotton terry covers like SureGuard or SafeRest feel more like regular bedding.
If bed bug protection is your top concern, a six-sided seal from Guardmax or Four Seasons offers better peace of mind.
7. AllerEase Maximum Allergy Mattress Protector – Allergy-Specific Design
AllerEase Maximum Allergy Mattress Protector, Queen Size
Maximum allergy defense
Waterproof backing
10-year warranty
Pros
- Designed specifically for maximum allergy protection
- Waterproof layer protects against spills and accidents
- Soft and quiet fabric with no crinkling
- Stretchy material fits mattresses up to 15 inches deep
- 10-year warranty included
Cons
- Some difficulty fitting very thick mattresses
- May require two people for installation
The AllerEase Maximum Allergy protector is built specifically for allergy sufferers, and that focus shows in the design. The brand has a long history in allergy bedding, and this particular model layers a soft, quiet top fabric over a waterproof backing to block dust mites, pet dander, and other common allergens. The zipper closure with a velcro security pocket adds an extra barrier against mites trying to enter through the zipper teeth.
Across more than 5,300 reviews, the most consistent feedback is allergy symptom improvement. Reviewers with year-round allergies and asthma report waking up with fewer symptoms within the first few weeks of use. The 10-year warranty is solid for this price tier, and the stretchy material accommodates a wide range of mattress depths, from twin and full up to 12 inches to queen and king up to 15 inches.
The main drawback is that some users find installation tricky on very thick mattresses, and the fabric, while quiet, doesn’t feel quite as plush as the cotton terry options. Still, for shoppers who want an allergy-focused brand with a proven track record, the AllerEase is a trustworthy pick. It’s especially well suited for kids’ beds and guest rooms where allergen control is the primary concern.
Who should buy this encasement
The AllerEase fits allergy sufferers who want a brand with deep expertise in allergen protection, families looking for an affordable allergy cover for kids’ beds, and shoppers who want a 10-year warranty at a mid-range price.
It’s also a strong choice for pet owners who need extra allergen defense.
When to look elsewhere
For the softest sleep surface, the cotton terry options like SureGuard or SafeRest are more comfortable.
For deeper mattresses above 15 inches, the LUCID offers a wider fit range.
8. Four Seasons Essentials Waterproof Encasement – Reinforced Zipper Seal
Queen Size Mattress Protector Waterproof Zippered Cover Premium Quality Encasement White
Velcro zipper seal
Reinforced seams
11-16 inch fit
Pros
- Six-sided encasement with velcro-sealed zipper
- Soft and noiseless stretchable fabric
- Breathable material prevents heat retention
- Reinforced zipper seam for extra durability
- Easy installation with three-sided zipper
Cons
- Single zipper rather than double zipper
- May be loose on mattresses under 12 inches deep
The Four Seasons Essentials encasement closes a common weak point in dust mite covers: zipper security. Most encasements rely on a single zipper that mites and bed bugs can theoretically slip through, but this model adds a velcro flap that seals over the zipper once it’s closed. Combined with a reinforced seam, it creates one of the most secure enclosures in this price range.
The polyester surface with polyurethane lining is soft, stretchable, and noiseless, which is exactly what users on allergy forums ask for. The fabric doesn’t trap heat, so hot sleepers can use it without feeling like they’re sealed in plastic. With more than 5,150 reviews averaging 4.6 stars, the Four Seasons Essentials has built solid credibility as a mid-range encasement that delivers.
The fit is rated for 11 to 16 inch mattresses, which covers most pillow-top and standard profiles but may be loose on thinner mattresses. The single zipper is a slight downgrade from double-zipper designs, though the velcro seal largely compensates for that. For shoppers who want reinforced allergen defense at a mid-tier price, this is a dependable pick. It also pairs well with our guide to the 10 best mattresses for heavy people if you’re outfitting a higher-capacity bed that needs extra allergen protection.
Who should buy this encasement
The Four Seasons Essentials fits shoppers who want extra zipper security against bed bugs and mites, owners of mid-depth to deeper mattresses, and anyone who values reinforced construction over premium brand names.
It’s also great for those setting up an allergy-friendly guest room.
When to look elsewhere
For thinner mattresses, the LUCID’s 6 to 18 inch range provides a better fit.
If certification matters to you, the SureGuard or Guardmax have stronger credentials.
How to Choose a Dust Mite Mattress Encasement?
The best mattresses encasement for dust mites shares a few core features: a pore size small enough to block mite allergens, a fully sealed zipper closure, and a breathable fabric that won’t trap heat. Beyond those basics, the right encasement depends on your mattress depth, allergy severity, and comfort preferences.
Pore size and weave density
Dust mite allergens range from about 10 to 40 microns, and dust mites themselves are around 100 to 400 microns. A truly effective encasement needs pores small enough to block both the mites and their waste particles. Look for tightly woven microfiber (pore size around 10 microns or smaller) or a polyurethane membrane (which is fully impermeable). Cheaper cotton covers with loose weaves may feel soft but often fail allergen tests.
Third-party certifications give you more confidence. SureGuard carries GREENGUARD Gold certification, and Guardmax is OEKO-TEX Standard 100 certified, both of which verify the fabric has been independently evaluated.
Medical-grade vs standard encasements
Medical-grade encasements are tested to stricter standards and typically feature pore sizes below 10 microns, fully sealed seams, and documented allergen blocking performance. They’re often recommended for severe asthma or allergy patients by allergists. Standard retail encasements use similar construction but may not have the same lab verification.
For most household allergy sufferers, a high-quality standard encasement like the HOSPITOLOGY or SureGuard delivers enough protection. For severe cases, look for encasements specifically labeled as medical-grade and tested to ASTM standards.
Breathability and comfort tradeoffs
Hot sleepers often complain about waterproof encasements trapping heat, and the complaint is valid for older vinyl covers. Modern encasements solve this with breathable polyurethane membranes or cotton terry tops that wick moisture. If you sleep hot, prioritize cotton terry surfaces (SureGuard, SafeRest) or jersey knit (Guardmax) over all-polyester constructions.
Reddit users in the r/Allergies subreddit frequently recommend layering a thin mattress pad over the encasement for added comfort, which is a good workaround if the encasement feels too clinical.
Fit, installation, and care
Measure your mattress depth before buying. Most encasements are rated for specific depth ranges, and a loose fit reduces the seal’s effectiveness. Two-person installation is the norm for queen and king sizes, so don’t try to wrestle a full encasement on alone.
Wash your encasement in hot water (130F or higher) every two to four weeks to kill accumulated allergens. Skip the fabric softener, since it can coat the waterproof membrane and reduce its effectiveness. Most covers on this list are machine washable and dryer safe on low heat.
If you’re also shopping for the mattress itself, our guide to the 10 best mattresses for couples covers how motion isolation and allergen-friendly materials interact, and our 10 best mattresses for adjustable beds guide is helpful if you use a base that requires specific cover dimensions.
Frequently Asked Questions
Do dust mite mattress covers really work?
Yes, quality dust mite mattress covers work when they fully encase the mattress with a tightly woven fabric or impermeable membrane and a sealed zipper closure. Studies show that encasements can reduce dust mite allergen levels in mattresses by up to 90 percent within a few weeks. The key is choosing a cover that seals all six sides, including the zipper, so mites cannot enter or escape. Look for pore sizes below 10 microns or a fully waterproof polyurethane membrane for the best results.
What kills dust mites in your mattress?
Hot water washing at 130F or higher kills dust mites on contact, which is why regular laundering of encasements and bedding is essential. Direct steam cleaning at high temperatures also kills mites deep in the mattress. Lowering indoor humidity below 50 percent starves mites of the moisture they need to survive. Encasing the mattress blocks new allergens from accumulating, and combining these methods delivers the strongest reduction in dust mite populations over time.
What type of mattress is best for people with dust mite allergies?
For allergy sufferers, the best mattress options are those made with materials that don’t trap allergens easily. Latex mattresses, particularly organic latex, resist dust mite colonization better than traditional innerspring mattresses because of their dense structure. Memory foam and high-density polyurethane foams also reduce mite-friendly space inside the mattress. Pairing any low-allergen mattress with a zippered dust mite encasement provides the strongest allergy defense.
Is there a dust mite-proof mattress cover available?
Yes, several encasements are specifically designed and tested to block dust mites and their allergens. The HOSPITOLOGY Sleep Defense System uses a lab-certified polyurethane membrane that blocks particles down to the allergen level, and the SureGuard Mattress Encasement features an Invisi-Zip closure and GREENGUARD Gold certification. Both are widely available online and ship in standard mattress sizes from twin to California king.
What is the best mattress cover to protect against dust mites?
The best mattress cover for dust mite protection is a fully zippered encasement that seals all six sides of the mattress with a pore size below 10 microns or a polyurethane membrane. Among the top picks in this guide, the SureGuard Mattress Encasement is our editor’s choice for its cotton terry comfort and GREENGUARD Gold certification. The HOSPITOLOGY Sleep Defense System is our best value pick for its lab-certified waterproof barrier and stretchable fit. Both deliver proven allergen reduction and long-term durability.
Final Verdict: Which Dust Mite Encasement Should You Buy?
After testing and comparing eight top-rated options, the best mattresses encasement for dust mites comes down to your priorities. For most allergy sufferers, the SureGuard Mattress Encasement delivers the best combination of comfort, certified protection, and long-term durability. If you want maximum value, the HOSPITOLOGY Sleep Defense System offers lab-verified allergen blocking at a price that fits most budgets. Budget shoppers should start with the Utopia Bedding protector, which has over 133,000 reviews backing its basic performance.
Whichever cover you choose, pair it with regular hot-water washing, indoor humidity control, and a low-allergen mattress to get the strongest possible reduction in dust mite symptoms. If you’re replacing your mattress alongside the encasement, our organic latex mattress guide is a great starting point for low-allergen construction. A good encasement is one of the highest-ROI allergy investments you can make for your bedroom, and most users see measurable symptom improvement within the first month.