Inov-8 · Running & Athletic Shoes
Inov-8 F-Fly Max Men's Shoes
Skip until brand discloses waterproof coating composition.
Inov-8 does not disclose PFAS status or waterproof treatment details. Running shoes typically use water-repellent coating coatings that may contain PFAS, but brand provides no information.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Synthetic textile upper with unspecified waterproof coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
You may also be interested in
Top-graded picks in the categories readers replace first, every one scored on the same rubric.
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.
What Inov-8 F-Fly Max Men's Shoes is made of, ingredients and materials
Inov-8 F-Fly Max uppers are synthetic textiles with an unspecified waterproof coating applied to the exterior. The coating type (whether polyurethane, PU-laminate, or fluorocarbon-based) is not publicly disclosed by the brand. Synthetic textile production often involves formaldehyde-based finishing resins for wrinkle resistance and shape retention, and azo dyes for coloring; neither is explicitly ruled out here. The waterproofing itself, graded separately as PFAS 20/100, represents a significant transparency gap.
What’s concerning
Waterproof / stain-resistant treatment
Water-repellent coating treatments have historically used PFAS.
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.
Formaldehyde / VOCs
Synthetic uppers commonly use formaldehyde-based resins for crease resistance and dimensional stability; Inov-8 does not disclose finish chemistry for this model. Off-gassing is typically highest in the first weeks of wear and decreases with washing and ventilation.
Source, ATSDR ↗Azo dyes in colored synthetics
The shoe's color is achieved through synthetic textile dyeing; azo dyes, which can break down into aromatic amines under sweat and friction, are not ruled out by available product information. No Oeko-Tex or similar testing is documented for this model.
Waterproof coating degradation and unknown leachables
Unspecified waterproof coatings degrade over time with UV and mechanical wear, especially on trail shoes. The unknown coating type means potential leachables (monomers, plasticizers, or residual PFAS precursors) cannot be ruled out; this is the primary reason PFAS grade is low.
Formaldehyde / VOCs
Graphic prints, logos, and dye fixatives on synthetic uppers may contain formaldehyde-releasing agents (e.g., dimethylol compounds) not declared on label. Initial odor from new shoes often reflects these volatile finishes.
Source, ATSDR ↗Microplastic shedding from synthetic upper and coating
Synthetic textiles and polyurethane-based coatings shed microfibers and particles during wear, particularly on high-friction zones (heel, toe). No protective measures (outer woven layer, biodegradable binder) are specified for this model.
The full breakdown
The brand's record and disclosure
Inov-8 has not publicly disclosed the chemical composition of waterproof coatings across its product line. No independent certifications (Oeko-Tex, Bluesign, GOTS) are listed for this model. The brand does not maintain a public restricted substances list or chemical inventory statement on its website. This silence on material sourcing is consistent with smaller athletic footwear manufacturers but contrasts with competitors who voluntarily report coating chemistry or pursue third-party verification.
How it compares in its category
Trail running shoes in this price segment typically use either PU or TPU coatings for waterproofing without disclosing PFAS content; Inov-8 is not unique in this opacity. Competitors like Salomon, Merrell, and La Sportiva similarly do not routinely publish waterproof coating specs. However, premium brands (Danner, Scarpa) and eco-focused lines (Altra, Topo Athletic) increasingly commit to PFAS-free or disclosed formulations. Inov-8 F-Fly Max sits in the middle of a market where waterproof coating secrecy remains standard but is progressively less defensible.
If you buy it
Wash in cold water (below 40C) to minimize potential formaldehyde-resin volatilization and dye bleeding into water. Air dry away from direct heat or UV; tumble drying or heat exposure can accelerate coating degradation and release of volatile finishes. Inspect seams and coating annually for peeling or cracking; once the waterproof layer delaminates, the underlying textile is exposed. Replace when structural integrity or waterproofing visibly fails, typically 12-18 months of regular trail use depending on care and storage conditions.
What we don’t know
- Basis
- Model estimate, 35% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Inov-8 has made none
Formulations change between production runs, so check the current label. How we grade.
Better-graded alternatives in Running & Athletic Shoes
Converse
Chuck Taylor All Star Cx Exp2 4.5 Men A07199C
- Canvas upper, rubber sole
- We found no PFAS statement from the brand
- Azo dyes in canvas
2 hazards checked on this product. See all of them.
Find an alternative on Amazon
Converse
Run Star Trainer
- Canvas, rubber sole
- We found no PFAS statement from the brand
- Azo dyes and synthetic dyes
4 hazards checked on this product. See all of them.
Find an alternative on Amazon
New Balance
Women's Fresh Foam Arishi v4 Shoes
- Mesh upper, Fresh Foam midsole, rubber outsole
- We found no PFAS statement from the brand
- Azo dyes and color-based toxins
2 hazards checked on this product. See all of them.
Find an alternative on AmazonMore running & athletic shoes 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.