Hylea
Leather Shoes
Dress shoes, casual leather footwear, and boots made primarily from animal leather. Leather tanning and finishing processes involve various chemicals, with chromium VI being a particular concern in chrome-tanned leather.
Why It Matters
Chrome tanning can produce toxic Chromium VI if poorly controlled - this is a known carcinogen and strong skin sensitizer. Azo dyes used in coloring may release carcinogenic amines. Lead has been found in some imported leather goods.
Chemicals of Concern in This Product
Chromium VI (Hexavalent Chromium)
A highly toxic form of chromium that can form during leather tanning if the process is poorly...
Restricted Azo Dyes
A large class of synthetic dyes used extensively in textile and leather coloring. While most azo...
Lead
A toxic heavy metal that was once commonly used in paint, plumbing, and many consumer products....
Formaldehyde and Formaldehyde Releasers
A colorless gas used as a preservative, disinfectant, and textile finishing agent. In clothing,...
VOCs (Volatile Organic Compounds)
A broad category of chemicals that easily evaporate at room temperature, releasing gases into...
Chlorophenols
A group of chemicals historically used as preservatives and biocides in leather and textiles...
Ingredient Red Flags
Watch for these on ingredient labels:
- Very cheap imported leather
- No tanning information
- Leather that causes skin irritation
- Strong chemical smell
- Unknown supply chain
What to Look For
- ✓Vegetable-tanned leather (uses plant extracts, not chrome)
- ✓Leather Working Group certified (audits for chemical safety)
- ✓Chrome-free tanning certification
Finding Safer Options
Vegetable-tanned leather shoes from brands like Adelante, Nisolo, or Thursday Boot Co. Plant-based leather alternatives like Pinatex (pineapple) or mushroom leather. Leather Working Group Gold-rated tanneries.
Certifications to Look For
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