Lowa · Hiking Shoes & Trail Runners
Lowa Men's Innovo Lo GTX Low Hiking Shoes
Moderate concern. Gore-Tex waterproofing likely contains PFAS; no disclosure.
Lowa does not disclose PFAS or water-repellent coating chemistry. Gore-Tex membrane in these hiking shoes typically uses PFAS-based Teflon-family coating for waterproofing. No third-party verification available.
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Material
Gore-Tex membrane, nubuck leather, rubber sole
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Waterproof / stain-resistant treatment
water-repellent coating treatments have historically used PFAS.
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
The Innovo Lo GTX uses Gore-Tex laminated to nubuck leather uppers, a rubberized toe cap, and a rubber/synthetic sole. Gore-Tex is a Teflon-type coating-based membrane engineered for waterproofing and breathability. Nubuck leather is sanded surface leather prone to water absorption and staining without treatment; tanneries often use chrome salts and formaldehyde-based finishing resins. The rubber sole contains vulcanization accelerators and antioxidants that are stable when dry but can leach slightly in wet conditions or with heavy sweat exposure.
The brand's record and disclosure
Lowa is a German outdoor footwear manufacturer with a reputation for durability and technical performance. The company has not publicly disclosed PFAS use, chemical supply chain audits, or commitment to PFAS phase-out, despite Gore-Tex waterproofing being their standard across product lines. No recalls or substantiated health complaints specific to Lowa hiking shoes are on public record. Industry-wide, most Gore-Tex footwear brands remain silent on PFAS content, treating it as proprietary.
How it compares in its category
Lowa sits mid-to-premium in hiking footwear for durability and fit precision. Most competing brands at this price point (Salomon, Merrell, Keen) use Gore-Tex or similar Teflon-type coating membranes, making PFAS exposure nearly universal in waterproof hiking shoes. Few brands offer certified PFAS-free alternatives at equivalent performance; those using wax-treated leather or non-synthetic membranes sacrifice breathability or weight. Lowa's nubuck choice is common; leather tanning chemicals are a secondary concern compared to the membrane.
If you buy it
Clean and dry the shoe promptly after wet use to minimize leather staining and mold risk in the Gore-Tex layer. Apply nubuck protectant spray before first use and reapply every 3-6 months; this reduces water absorption and chemical adhesion. Avoid prolonged exposure to direct heat (radiators, hair dryers) as rubber compounds can harden and crack. Replace the shoes when the sole tread drops below 2mm or upper seams separate; Gore-Tex retains function but the shoe's integrity degrades.
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.”
Formaldehyde-based leather finishing resins
Nubuck leather finishing commonly involves formaldehyde-releasing resins and dyes. Off-gassing is greatest in the first week; ventilate new shoes in open air before extended wear against skin.
Chrome tannage residue in leather
Most nubuck leather uses chrome sulfate tanning, which is stable once dried but can leach trace amounts in prolonged wet conditions (sweat, rain). Skin contact is indirect (through textile lining), limiting exposure risk.
Rubber sole vulcanization compounds
Rubber soles contain accelerators (typically N-cyclohexylbenzothiazole sulfenamide) and antioxidants that are chemically bound. Leaching is minimal in dry use; sweat and heat can slightly increase migration, but no established health risk at typical exposure levels.
Azo dyes in synthetic overlays/seams
No public record of azo dye restriction violations in Lowa products. Modern European manufacturing typically filters aromatic amines, but Lowa does not transparently disclose dye chemistry.
Mold and bacterial growth in Gore-Tex laminate
Gore-Tex membranes are porous and can trap moisture if not fully dried after wet use. Bacteria and mold colonization occurs gradually in damp storage; risk is minimized by air drying with insole removed and storing in cool, dry conditions.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 45% 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.
More hiking shoes & trail runners 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.