Proprietary high-walled Vibram soles are stitched to the upper. Durably Waterproof and Breathable GORE-TEX fabric. Rocky Air-port cushion footbed. Supportive fiberglass shank. Trade friendly, not Berry compliant. Triple-stitched. Wicking Dri-Lex lining with Aegis Microbe Shield. Flash and water resistant leather upper. Lycra Tongue. PTFE coated for flame-resistance.