Signature Footshape allows feet to sit naturally Vibram Megagrip provides unparalleled grip on wet and dry surfaces Trailclaw canted lugs provide added traction underfoot Balanced Cushioning platform encourages better alignment and form Gore-Tex makes shoes waterproof, windproof, and breathable Innerflex grooves provide flexibility and movement Specs Upper:   GORE-TEX Midsole:   Compression Molded EVA Outsole:   Vibram Megagrip Cushion:   Max