Asics · Waterproof Sports Gear
ASICS Men's COMFORT CORE STRETCH Shorts
Lower concern; basic athletic shorts with no water-repellent coating or stain treatment disclosed.
ASICS Comfort Core Stretch shorts are polyester-blend knit without reported water-repellent or stain-resistant finishes. ASICS does not disclose PFAS use for this product, but absence of functional coatings reduces typical PFAS risk.
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Material
polyester blend stretch knit, no reported water-repellent treatment
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
Category baseline
clothing is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
ASICS Comfort Core Stretch Shorts are a polyester-blend knit, likely polyester with spandex elastane for stretch. Polyester itself is a stable synthetic polymer with low chemical leaching risk in normal wear. The blend design prioritizes moisture-wicking and recovery over water resistance, meaning no water-repellent fluorinated coatings (Teflon-type coating or PFAS-based water-repellent coating treatments) are disclosed, which eliminates a major chemical hazard class found in outdoor or technical apparel.
The brand's record and disclosure
ASICS has not made detailed public commitments on PFAS phase-out or comprehensive chemical transparency similar to some outdoor brands, though the company is part of broader apparel industry exposure to chemical regulation. For this specific product line, no manufacturing recalls, chemical safety controversies, or formaldehyde issues have been reported. ASICS is a mainstream sportswear manufacturer with standard supply-chain oversight but limited transparency on dye chemistry or flame-retardant use in non-activewear lines.
How it compares in its category
Basic athletic shorts occupy a lower-risk segment compared to water-repellent outdoor or hiking shorts that typically carry PFAS treatments. This product avoids the chemical coatings common in premium performance gear, placing it in the mid-range safety profile for sportswear. Polyester athletic knits are standard category practice and carry no documented hazard beyond typical synthetic fabric concerns (azo dyes, formaldehyde finishing resins).
If you buy it
Wash in cool water before first wear to reduce loose dye or finishing chemicals. Machine wash warm or cool (not hot) and air dry or low heat to preserve elastane integrity; high heat can degrade spandex over 2-3 years of frequent washing. No special care required beyond standard athletic apparel practice. Replace when elastication fails or seams fray, typically after 100+ washes of normal use.
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.”
Azo dyes and formaldehyde-release finishes
Polyester athletic knits are typically finished with formaldehyde resins for wrinkle resistance and dyed with standard azo chemistry. No specific ASICS Comfort Core recall or restriction on azo dyes is on record, but pre-wash is prudent to reduce residual finish exposure.
Antimony in polyester fiber
Polyester is synthesized using antimony as a catalyst; trace amounts may remain in finished fiber. Dermal contact with intact fabric poses negligible risk, but this is an inherent polyester concern, not brand-specific.
Elastane (spandex) degradation under heat and UV
Spandex stretches degrade with high-temperature washing, chlorine exposure, and sunlight. Practical concern is loss of fit over time rather than acute chemical hazard, but overheating (dryer use) accelerates breakdown.
Flame retardants
Athletic shorts for adults are not subject to flammability standards requiring added flame-retardant chemicals. No flame-retardant treatment is disclosed or expected for this product.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% 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 Waterproof Sports Gear
Patagonia
Men's 10" Quandary Shorts
nylon/polyester blend with water-repellent coating treatment
Lower concern. Patagonia uses PFC-free water-repellent coating; verify MADE SAFE label on tag.
✓Lab test found no PFAS
More waterproof sports gear 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.