Product Reviews ➜ Bedroom ➜ Mattress Protectors
Non Toxic Mattress Protectors
Non-toxic mattress protectors are made with GOTS-certified organic wool or cotton, free of vinyl, PFAS, phthalates, and off-gassing finishes. Mattresses need reliable moisture protection, which presents a trade-off: the healthiest natural fabrics are only moderately waterproof, while fully waterproof options rely on some synthetic content. The best options are the certified non-toxic ones below, which gets you full waterproofing without the usual chemicals. I evaluate every protector's fabric and waterproofing layer using the same certification-based scale explained in my full methodology.
By Dr. Meg Christensen | Physician-founder of Interior Medicine, a non-toxic home resource built on her background in medicine, biochemistry, epidemiology, and clinical research.
Updated October 13, 2026
Savvy Rest Organic Waterproof Mattress Protector
This is the most affordable organic waterproof mattress protector. It's made of two layers of GOTS certified organic cotton, sandwiched around an ultra-thin layer of waterproof TPU made from cornstarch. Cornstarch TPU is a breathable, plastic-like film that is the safest way to waterproof a mattress. It's not noisy or rigid, and comprises 5% of the total mattress protector. TPU is not the same thing as a polyurethane (PU) foam, and is much safer (read more below), especially when the ingredients are disclosed, as Savvy Rest always does. The entire mattress protector is GOTS certified, not just the cotton.
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Avocado Organic Cotton Mattress Protector
If you want a wool-free, TPU-free, synthetic-free mattress protector, you sacrifice some waterproofing, so a thick version that can withstand night sweats or accidents, combined with washability, is essential. Avocado makes a 100% GOTS certified organic cotton mattress protector in every size between Twin and California King. Avocado always goes the extra mile with PFAS testing, GreenGuard GOLD certification, and a slew of other verifications that it's as healthy as possible.
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Sleep & Beyond MyProtector Washable Wool Mattress Protector
This is the best washable wool mattress protector. Sleep & Beyond uses Bio-Wash made with enzymes instead of chlorine to make the wool washable. They also don't use synthetic coatings, so there are no microplastic concerns. I confirmed this with them via email. This is a rarity in wool, but especially in wool mattress protectors which are generally great because they're thermoregulating and hypoallergenic. You can read more about washable wool in the Superwash section of my Fabric Guide. Covered in a cotton encasement, the whole thing has OEKO TEX certification. This is a bit of an under-the-radar brand, but they truly do have the OEKO TEX and GOTS licenses to back up all their products and they're relatively affordable.
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SIJO AiryWeight Eucalyptus Mattress Protector
SIJO offers the most affordable OEKO TEX certified mattress protector made out of Eucalyptus TENCEL, with a polyester backing. The advantage of these synthetics is that they provide very good waterproofing and easy washability. These are also certified Allergy and Asthma friendly, if you have an allergy to wool. Imperfectly healthy, these are the best non-toxic mattress protectors if you're on a budget, vegan, or want an affordable way to buy two mattress protectors that you can rotate during laundry loads.
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See the rating scalesNon-Toxic Mattress Encasements
Eco Living Friendly OEKO TEX Certified 1 Micron Dust Mite Mattress Encasement
This six-sided dust mite encasement is the best mattress protector for dust mite allergies because it's made of non-woven fabric, meaning the pores between threads are 1 micron or less in size. This detail is super important because 1 micron is smaller than dust mite feces, fragments (and mold spores, too.) Made of polyester, and amazingly has OEKO TEX certification. Zip it around your mattress and consider it permanent. Add a regular mattress protector on top that you can remove and wash regularly. I have this for my own bed (and pillowcases) and it works wonders for my allergies.
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Sleep & Beyond GOTS Certified Organic Waterproof 3 Micron Dust Mite Mattress Encasement
This is a truly organic cotton mattress encasement with a TPU film that adds both waterproofing and some dust mite resistance with a 3 micron weave. That's not as tight as the 1 micron weave that the elf brand has, but will still drastically reduce the amount of dust mite and fragments that can reach your mattress. It also has the added advantage of being GOTS certified organic, instead of OEKO TEX certified polyester.
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FYI, “non-toxic” has no official definition, so I rate every product with the same method. It’s built on third-party certifications and published test data, not brand claims. For a deeper dive, my free course walks you through it.
Everything on Interior Medicine is educational information, not medical advice. Read my full disclaimer.
How I Rate Mattress Protectors
“Non-toxic” has no legal or scientific definition, so it’s become a marketing word. I still think a healthier home is worth working toward, and the way to get there is with a consistent system. Every product on Interior Medicine is rated with the same method, based on its materials, ingredients, and third-party certifications. This makes it easier to compare products fairly, spot healthwashing, and make informed decisions.
I rate mattress protectors on two separate scales: material health and health function. A mattress protector's health function is keeping moisture out. Sweat, spills, and accidents that reach a mattress create the damp conditions where mold, bacteria, and dust mites thrive, so a mattress protector's health benefit depends on how completely it blocks liquid.
This is one of the unusual cases (along with blackout curtains and shower curtains) where synthetics often outperform organic fabrics, which can't achieve full waterproofing on their own.
Material Health
Mattress protectors are made of fabric, sometimes paired with a thin waterproofing layer like TPU. Each material is rated on its own Material Health Scale, from Healthiest to Harmful.
Material health is only half the rating.
Health Function: Waterproofing
On its own, material health doesn't account for how well the protector does its job. This is the scale I use for that job, built on my standard Health Function Scale.
TIER 01
Highest
What qualifies
Fully waterproofs the mattress, blocking all liquid from reaching it.TPU film
Evidence
TPU film is one of the two main waterproof, breathable membranes used in textiles (An 2025). It avoids the bigger chemical concern in other waterproof PU fabrics, which is DMF, a solvent used in the coating process that is classified as a reproductive toxicant and restricted in the EU. TPU film can be bonded to fabric with heat instead.
TIER 02
High
What qualifies
Waterproofs the mattress very well overall, with a minor limitation like reduced breathability or a barrier that isn't 100% guaranteed to stop leaks.Polyester, wool
TIER 03
Moderate
What qualifies
Absorbent enough to handle small spills and sweat, but won't stop a larger volume of liquid from reaching the mattress.Thick cotton
TIER 04
Low
What qualifies
Absorbs some moisture, but lets most of it through.Thin cotton
Evidence
Dust mites feeding in mattresses gather in the top layer, closest to the sleeper, where it's warm and humid. In lab cultures, their populations grew fastest at high humidity (Vackova 2023).
TIER 05
Lowest
What qualifies
Provides no moisture protection.No mattress protector
Evidence gaps
No study has tested mattress protectors against mold, bacteria or dust mites in home mattresses, or compared protector materials directly. The tiers apply what's known about moisture in bedding to how much liquid each type stops.
More About Non-Toxic Mattress Protectors
Do you need a mattress protector?
Yes! It protects your mattress, which is usually quite an investment, from breaking down quickly, as well as from sweat and germs.
Are mattress protectors and pads the same thing?
Not quite. While both can protect the mattress from stains, spills, and sweat, mattress pads typically have a small amount of padding sewn in to them. Protectors are typically just the fabric, without padding, and it’s primary purpose is protection only, not comfort.
Do you need a waterproof mattress cover?
If you have young kids, are a heavy sweater, or there are any other possibilities of liquids seeping through your sheets and into your mattress, I definitely recommend a waterproof option to prevent mold, bacteria, and dust mites, all of which thrive in damp, humid places.
What is TPU?
TPU stands for thermoplastic polyurethane, and it is a plastic-based film that is used as a waterproofing fabric in mattress protectors.
How is TPU made?
Like PU (polyurethane, the foam found in mattresses), TPU is also created from two basic building blocks — polyols and diisocyanates (you can watch my 60 second video about what these are and how foam is made here). But, there are a few important differences. First, the two building blocks bond together permanently in a much more predictable and controlled way. Once they’re bonded together (“cured”) , they don’t un-bond. This is less true for polyurethane foam, which has additives to poof it up and soften it, and having uncured ratios of these chemicals can cause some health problems.
Also, new forms of TPU can be biodegradable, made with B. subtilis, a soil-based probiotic bacteria— or can even use cornstarch to replace the petroleum-derived polyols.
Is TPU non toxic?
It is very unlikely to harm you, and depends on how it’s made. The biggest chemical concern in waterproof polyurethane fabrics is DMF, a solvent used in solvent-based coating processes. It is classified as a reproductive toxicant and restricted in the EU. TPU film, however, can be bonded to fabric with heat instead, without solvents.
Bio-based TPUs, made partly from corn, castor oil, or sugarcane, lower the carbon footprint, so the low-emission benefit comes from how the film is made, not what it’s made from.
Even a conventional TPU is healthier than vinyl and PFAS, protects against mold, sweat, and bacterial build-up in a mattress, and is relatively affordable.
Are there natural waterproof mattress protectors?
Yes. The world of non toxic waterproof fabric can be tricky— traditional options, often made with PVC, are notoriously toxic, and many non-PVC options are made with fabric processing chemicals that can off-gas. Here’s what I recommend:
Choose a GOTS certified organic, washable thick cotton one if you are prioritizing material health above all else.
Choose GOTS certified organic fabric with a super-thin layer of polyurethane film (TPU) in between the layers: strikes the best balance for most people between convenience (washability, waterproofing) and material health
Choose an OEKO TEX certified polymer fabric option if you’re prioritizing affordability.
Product Reviews ➜ Bedroom ➜ Mattress Protectors