Stio Review, Is Stio Non-Toxic?
Stio averages 20 out of 100 on PFAS Authority's PFAS and toxin screen across the 4 Stio products graded as of October 2026, and none of them reach its 70 point pass mark.
Stio grades Bad 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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Top-graded picks in the categories readers replace first, every one scored on the same rubric.
- 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, all on its full breakdown.
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, all on its full breakdown.
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, all on its full breakdown.
Which Stio products contain PFAS? Poor and Bad, we’d swap these
- Nylon with water-repellent coating treatment (type unspecified)
- We found no PFAS statement from the brand
- PFAS. Stio has not disclosed the specific water-repellent coating formulation. If legacy PFAS-based…
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon- down insulation with unknown water-repellent coating
- We found no PFAS statement from the brand
- PFAS. Down jackets nearly always receive a water-repellent coating treatment. Stio does not disclose whether…
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon- Nylon shell with unspecified water-repellent coating
- We found no PFAS statement from the brand
- PFAS. Nylon windshells overwhelmingly use PFAS-based water-repellent coating coatings; Stio's refusal to…
3 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon- Stretch fabric with water-repellent finish
- We found no PFAS statement from the brand
- Antimony in polyester fiber. If fabric is polyester blend (likely, given stretch properties), antimony…
3 hazards checked on this product, all on its full breakdown.
Find an alternative on AmazonStio and PFAS, common questions
- Does Stio have PFAS?
- Stio averages 20 out of 100 on PFAS Authority's PFAS and toxin screen across the 4 Stio products graded as of October 2026, and none of them reach its 70 point pass mark. Grades are model-based estimates built from published materials, ingredients and disclosures, not lab tests.
- Is Stio non-toxic?
- No Stio product we graded reaches Good. The best of them is Environ Jacket at 20/100.
- Which Stio products should I avoid?
- The lowest-graded Stio products we have scored are Skillet Stretch Down Hooded Jacket, Second Light Windshell, Pinion Down Hooded Jacket. Each one links to the evidence behind its grade.
Every grade uses the same public rubric. How grades work →