Seafolly Women's Long Sleeve Zip Front One-Piece Swimsuit
Moderate PFAS risk; synthetic swimwear with likely coating, no disclosure.
This long-sleeve nylon-polyester one-piece gets treated for water resistance and durability, typically involving fluorinated compounds like PFAS or alternatives. Seafolly has no public PFAS policy or certification.
The better-graded swap
Patagonia
Patagonia Women's Bottom Turn Racerback Bikini Top
90/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Nylon/polyester blend with water-repellent coating finish
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What Seafolly Women's Long Sleeve Zip Front is made of, ingredients and materials
This swimsuit is a nylon/polyester blend treated with a water-repellent coating (water-repellent coating) finish. water-repellent coating coatings are the primary concern in swimwear because they historically relied on PFOA and PFOS (legacy PFAS chemicals) and still commonly contain replacement PFAS compounds. The nylon and polyester themselves are stable synthetic fibers with low migration risk in normal water exposure, but the coating's chemistry is opaque for most brands including Seafolly.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Waterproof / stain-resistant treatment
Water-repellent coating treatments have historically used PFAS.
PFAS
Legacy or replacement PFAS compounds are standard in synthetic water-repellent swimwear coatings. Seafolly's silence on this issue and lack of public testing data means the presence of PFAS should be assumed probable, especially if the product is marketed as 'water-resistant' or 'quick-dry.'
Source, ATSDR ↗Azo dyes in polyester/nylon blend
Polyester and nylon textiles commonly use azo dyes, some of which break down into carcinogenic amines under heat, sweat, or UV exposure. No public testing or restrictions are documented for Seafolly swimwear, so this remains within industry-standard risk for colored synthetics.
Formaldehyde / VOCs
Water-repellent coating finishes and elastic reinforcements in swimwear may contain formaldehyde-releasing resins used for durability and dye-setting. Seafolly provides no material specification data, so the presence and level cannot be verified. Initial off-gassing typically occurs in the first few washes.
Source, ATSDR ↗Microplastic shedding from coating or fibers
Degraded water-repellent coating coatings and synthetic fibers themselves can shed microplastics into water with use and washing. This is an environmental concern shared by most synthetic swimwear; Seafolly's material quality and durability claims cannot be independently verified from public data.
What’s reassuring
Antimony in polyester
Polyester can contain antimony as a catalyst, but systemic absorption through swimwear worn briefly in water is considered negligible by regulatory bodies. No specific concerns are documented for this product or brand.
The full breakdown
The brand's record and disclosure
Seafolly has not published any public position on PFAS use, chemical restrictions, or testing protocols for its water-resistant products. The brand has no known certifications such as OEKO-TEX or bluesign that would provide third-party assurance on PFAS or other restricted substances. Without disclosure, it is impossible to confirm whether the water-repellent coating finish uses legacy PFAS, newer fluorine-free alternatives, or undisclosed PFAS replacements.
How it compares in its category
Most mainstream swimwear brands (Speedo, Arena, TYR) similarly do not disclose water-repellent coating chemistry; a small number (Patagonia, some niche lines) have committed to PFAS-free water-repellent coating or avoid the treatment entirely. Seafolly sits in the silent majority, making it roughly average in transparency but below emerging best-practice leaders. If water-repellent coating is your concern, only brands with explicit PFAS-free claims or third-party testing provide meaningful differentiation.
If you buy it
Wash the suit in cool water with mild detergent after each use to remove salt and chlorine; avoid hot water and dryers, which can degrade coatings and potentially increase leaching. Do not dry-clean or expose to high heat. Replace when the fit degrades or elastic fails, typically 1-2 years with regular use. If PFAS exposure is a priority concern, request the brand's water-repellent coating specification or consider PFAS-free alternatives before purchase.
What we don’t know
- Basis
- Model estimate, 45% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Seafolly has made none
Formulations change between production runs, so check the current label. How we grade.
Better-graded alternatives in Swimwear
Patagonia
Women's Bottom Turn Racerback Bikini Top
- Nylon/polyester blend with elastane (standard swimwear)
- The brand calls it PFAS-free, which we have not verified
- Elastane (spandex) degradation under heat or chlorine
Solid & Striped
Taylor One Piece Seersucker Plaid
- Cotton/cotton-blend seersucker plaid
- We found no PFAS statement from the brand
- Azo dyes and colorfast stability
2 hazards checked on this product. See all of them.
Adidas
Women's Mexicana Florals Tie-Back Swimsuit
- Polyester/nylon swimsuit fabric, likely uncoated or standard finish
- Azo dyes and synthetic colorants
4 hazards checked on this product. See all of them.
More swimwear 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.