Waterproof membrane seals out water and lets moisture escape - Non-wicking mesh and TPU upper - Bellows tongue keeps out debris - 100% recycled breathable mesh lining - 100% recycled mesh footbed cover - NXT lined footbed cover to prevent odor - COMFORTBASE removable contoured footbed cradles your foot in all day comfort - Rock plate for protection - Merrell air cushion in the heel absorbs shock and adds stability - Lightweight EVA foam midsole for stability and comfort - Vibram TC5+ outsole technology gives you confidence with every step from mountain trails to city streets