Mainstays Review, Is Mainstays Non-Toxic?
Mainstays averages 44 out of 100 on PFAS Authority's PFAS and toxin screen across the 6 Mainstays products graded as of October 2026, and 2 of them reach its 70 point pass mark.
Mainstays grades Poor on our four-band scale. On disclosure, the brand says nothing publicly about PFAS. See what every brand has published about PFAS for how that compares.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
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Aqua Pure
3M Aqua-Pure AP802B Whole House Filter Housing
- polypropylene filter housing, carbon/sediment cartridge
- We found no PFAS statement from the brand
- Bacterial growth in spent cartridges
3 hazards checked on this product. See all of them.
Aquasure
Premier Series 75 GPD Under Sink Reverse Osmosis Water Filtration System
- RO membrane, carbon filters, stainless steel housing
- We found no PFAS statement from the brand
- Bacterial and microbial growth in housing and filters
4 hazards checked on this product. See all of them.
Avocado
Vegan Mattress
- organic cotton, natural latex, coconut coir, recycled steel coils
- The brand calls it PFAS-free, which we have not verified
- Heavy metals
2 hazards checked on this product. See all of them.
Worth buying from Mainstays Good or better, best-graded first
Mainstays
Food Container Reusable Insulated Stainless Steel
- stainless steel interior, insulated construction
- We found no PFAS statement from the brand
- Gasket/seal material degradation, Rubber or silicone seals can deteriorate with repeated heating and cooling…
2 hazards checked on this product. See all of them.
Mainstays
Reusable Silicone Baking Mat
- silicone
- We found no PFAS statement from the brand
- Silicone leaching (oligomers), Food-grade silicone can release trace cyclic oligomers at high heat or with…
3 hazards checked on this product. See all of them.
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Nexgen Waterproof Fitted Mattress Protector
- Polyester fabric with waterproof coating (type unspecified)
- We found no PFAS statement from the brand
- Waterproof coating off-gassing (VOCs/unknown chemicals), Unspecified polyurethane or fluorocarbon coatings…
4 hazards checked on this product. See all of them.
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Mainstays
Cooling Waterproof Fitted Mattress Protector
- Polyurethane or polyester blend with waterproof coating (type unspecified)
- We found no PFAS statement from the brand
- PFAS, Waterproof Inc. does not disclose coating chemistry. Conventional water-repellent coating finishes in…
5 hazards checked on this product. See all of them.
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Jersey Soft Fitted Mattress Cover Protector
- Jersey knit with waterproof coating (unspecified)
- We found no PFAS statement from the brand
- PFAS, The product is marketed with a waterproof barrier but no disclosure of the treatment agent. Industry…
4 hazards checked on this product. See all of them.
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Quart Vacuum Sealer Bags
- Polyethylene with heat-seal coating, grease-resistant treatment
- We found no PFAS statement from the brand
- PFAS, Grease-resistant vacuum-seal bags almost universally use PFAS compounds; Mainstays bags are not…
4 hazards checked on this product. See all of them.
Find an alternative on AmazonMainstays and PFAS, common questions
- Does Mainstays have PFAS?
- Mainstays averages 44 out of 100 on PFAS Authority's PFAS and toxin screen across the 6 Mainstays products graded as of October 2026, and 2 of them reach its 70 point pass mark. Grades are model-based estimates built from published materials, ingredients and disclosures, not lab tests.
- Is Mainstays non-toxic?
- Mainstays Food Container Reusable Insulated Stainless Steel is the highest-graded Mainstays product we have scored, at 80/100. It depends on the product line rather than the brand, so check the grade of the exact item you are buying.
- Which Mainstays products are lower concern for PFAS?
- The highest-graded Mainstays products we have scored are Mainstays Food Container Reusable Insulated Stainless Steel, Mainstays Reusable Silicone Baking Mat. That is our model-based estimate from materials and public disclosure, not a lab test.
- Which Mainstays products should I avoid?
- The lowest-graded Mainstays products we have scored are Mainstays Quart Vacuum Sealer Bags, Mainstays Jersey Soft Fitted Mattress Cover Protector, Mainstays Cooling Waterproof Fitted Mattress Protector. Each one links to the evidence behind its grade.
Every grade uses the same public rubric. How grades work →