Helix · Mattresses
Helix Midnight Mattress
Lower PFAS concern for a foam mattress, but Helix provides no transparency on fire retardants or surface treatments.
The Helix Midnight is a memory foam mattress with no known Teflon-type coating or intentional Teflon-family coating coatings. However, Helix does not publicly disclose chemical additives, fire-retardant chemistry, or any PFAS-related testing.
Shop Helix on Amazon →Material
Gel-infused memory foam, polyurethane foam, polyester cover
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
furniture is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
The Helix Midnight uses gel-infused polyurethane memory foam as its core comfort layer, topped with a polyester fabric cover. Polyurethane foam is inherently combustible, so manufacturers must add flame retardant chemicals to meet federal flammability standards (16 CFR 1633). Gel infusion itself (silica or paraffin-based) is stable and low-concern, but the real issue is which flame retardants and off-gassing chemicals are present in the foam and adhesives, which Helix does not disclose.
The brand's record and disclosure
Helix does not provide a transparency report on flame retardants, VOC emissions, or third-party certifications (such as CertiPUR-US or Oeko-Tex) on their product pages. The brand has not faced major recalls or public safety controversies, but their silence on chemical treatments is notable in an industry where competitors increasingly market low-chemical alternatives. No evidence of response to customer concerns about off-gassing or chemical sensitivity.
How it compares in its category
Standard memory foam mattresses universally require flame retardants and carry inherent off-gassing risk in the first weeks. Helix's gel-foam design is mainstream and not distinguished by chemical transparency; many competitors (Casper, Purple, Avocado) now provide CertiPUR-US or similar certifications and publicly commit to restricted chemical lists. The Midnight occupies the mid-market comfort tier but lags on environmental and chemical disclosure compared to premium or eco-focused alternatives.
If you buy it
Expect off-gassing odor for 1-3 weeks; ventilate the bedroom well and consider off-gassing mattresses in a garage or spare room first. Avoid placing directly on concrete or in very damp basements, as moisture can promote mold and bacterial growth in polyurethane foam. Use a mattress protector to reduce dust mite ingress and off-gassing particle inhalation. Do not expose to prolonged direct heat or flame; keep away from electric blankets or heating pads on high settings, as polyurethane degrades above 140°F and can leach compounds.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Flame retardant chemicals (identity and composition undisclosed)
Helix does not disclose which flame retardants are used in the Midnight's polyurethane foam. Federal mattress standards require them; common choices include brominated compounds, chlorinated phosphates, or melamine, all of which carry potential respiratory or dermal irritation risk with prolonged off-gassing exposure. Without transparency, consumer exposure cannot be assessed.
Volatile organic compound (VOC) off-gassing
New polyurethane foam mattresses routinely emit VOCs (formaldehyde, benzene, toluene) during the first 1-4 weeks. Helix does not publish VOC test results or emission limits. Off-gassing intensity depends on manufacturing practices and adhesive chemistry; lack of CertiPUR-US certification means no third-party VOC cap is guaranteed.
Polyester cover degradation and microfiber shedding
The polyester fabric cover will pill and shed microfibers with use and washing, particularly in the first year. While microfiber inhalation risk in a mattress context is low, shedding into bedding and dust is common with budget-to-mid-range polyester textiles. No information available on the cover's dye chemistry or chemical finishing (e.g., formaldehyde resins used for wrinkle resistance).
Moisture and mold risk in high-humidity environments
Polyurethane foam mattresses retain moisture and are prone to mold and bacterial colonization if exposed to humidity above 60% or placed on damp surfaces. Helix's gel-infused foam does not have special antimicrobial properties; prolonged dampness can generate musty odors and potential mycotoxin off-gassing. Proper ventilation and use of a breathable mattress protector mitigate this.
Thermal degradation of polyurethane at high temperatures
Extended exposure to heat (e.g., electric blankets, direct sunlight, room temps above 140°F) can degrade polyurethane foam and release additional volatiles and isocyanate compounds. Helix does not provide guidance on temperature limits or safe heating practices. This is a low-risk hazard in typical indoor use but important for users in hot climates or with heating equipment.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 62% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Mattresses
Avocado
Organic Hybrid Mattress
organic cotton, natural latex, wool, innerspring coils
Lower PFAS concern, natural materials without stain treatments, but brand doesn't explicitly address PFAS.
✓Verified PFAS-free by a third party
Avocado
Organic Wool Mattress
organic wool, organic cotton, natural latex
Lower PFAS concern; organic/natural core materials with no reported chemical treatments typical for this category.
✓Verified PFAS-free by a third party
Avocado
Vegan Mattress
organic cotton, natural latex, coconut coir, recycled steel coils
Lower-concern choice; vegan mattress avoids PFAS-prone synthetic foams and polyurethane, backed by credible third-party seals.
✓Verified PFAS-free by a third party
More mattresses grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.