La Sportiva · Waterproof Boots
La Sportiva Men's Eclipse GTX Hiking Boots
Gore-Tex lining likely contains PFAS; La Sportiva silent on disclosure.
La Sportiva does not disclose PFAS content. Gore-Tex waterproofing in the lining typically uses PFAS chemistry, though Gore-Tex formulations vary. No third-party PFAS testing found for this model.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Nubuck leather upper, Gore-Tex lining, synthetic sole
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What La Sportiva Men's Eclipse GTX Hiking Boots is made of, ingredients and materials
These boots combine nubuck leather upper (a suede-like abraded leather finish) with Gore-Tex waterproof lining and synthetic rubber sole. Nubuck is a natural material but undergoes tanning and surface treatment; Gore-Tex is a Teflon-family coating membrane (Teflon-type coating-based) engineered for breathable waterproofing. The synthetic sole is typically thermoplastic rubber or polyurethane. This combination is standard for premium hiking boots but introduces potential exposure to tanning chemicals, fluorinated polymers, and adhesives used to bond materials.
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.
Leather tanning chemicals and finishes
Nubuck leather undergoes chrome or vegetable tanning followed by surface abrading and staining. Chrome residues and synthetic dyes are standard in this process; no recalls or contamination reports exist for La Sportiva boots, but tannery practices vary. Skin contact during wear is low risk; primary exposure is off-gassing of volatile compounds during the first weeks.
Teflon-type coating/Teflon-family coating off-gassing (Gore-Tex membrane)
Gore-Tex lining contains Teflon-type coating membrane. Under normal wear conditions at body temperature, Teflon-type coating off-gassing is minimal and not documented to cause acute harm. Risk increases only if boots are exposed to direct heat above 260C (flame, oven), which is outside normal use. See PFAS section for per- and polyfluoroalkyl substance concerns.
Adhesive and laminate off-gassing (upper-lining bond)
Nubuck upper is bonded to Gore-Tex and inner lining using polyurethane or polyester-based adhesives. VOC emissions (formaldehyde, toluene, xylene) are typical in the first 1-2 weeks of wear, especially in warm, humid conditions. This is a standard risk for all bonded leather footwear and typically resolves quickly.
Synthetic sole degradation and microplastic shedding
The thermoplastic or polyurethane sole will gradually break down and shed microparticles, especially on abrasive terrain or with aging. This is inherent to all synthetic soles and is not specific to La Sportiva. Replacement of worn soles (rather than full boot replacement) reduces waste.
What’s reassuring
Formaldehyde / VOCs
Inner linings and padding fabrics may contain formaldehyde-based resins for shape retention and water resistance, though Gore-Tex itself is not formaldehyde-treated. No specific test results or complaints are on record for La Sportiva hiking boots. Standard for the category.
Source, ATSDR ↗The full breakdown
The brand's record and disclosure
La Sportiva is an Italian outdoor footwear and climbing gear manufacturer with a strong reputation for technical performance but minimal public transparency on chemical safety. The brand has not published PFAS disclosure statements or committed to phase-out timelines, despite Gore-Tex lining being standard across much of their boot range. No significant recalls or safety controversies are on public record for this model. They do not appear to have third-party chemical certifications (e.g., OEKO-TEX, bluesign) for this product line.
How it compares in its category
Most premium hiking boots at this price point and performance level use Gore-Tex or similar fluorinated waterproof membranes, making PFAS presence nearly universal. Some competing brands (e.g., Scarpa, Merrell higher tiers) also use Gore-Tex without disclosure. A smaller subset of brands now market PFAS-free alternatives using waxed leather or newer synthetic membranes, though these are less common in premium technical boots. This product is typical for its category rather than a standout for chemical transparency.
If you buy it
Condition the nubuck upper regularly with appropriate leather care products to maintain water resistance and slow degradation; avoid high-heat drying after wet conditions (air dry at room temperature). Inspect the Gore-Tex lining yearly for delamination or seam separation, as these compromise waterproofing and are the most common failure mode. Replace insoles as they wear (typically 12-18 months of regular use) to maintain cushioning. Expect a lifespan of 2-5 years depending on use intensity and care.
What we don’t know
- Basis
- Model estimate, 55% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- La Sportiva has made none
Formulations change between production runs, so check the current label. How we grade.
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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.