Waterproof membrane seals out water and lets moisture escape. 82% recycled Jacquard upper. Metal hook with traditional lace closure.Padded collar. 100% recycled breathable mesh lining. 100% recycled mesh footbed cover. Cleansport NXT™ treated for natural odour control. 50% recycled removable EVA foam footbed. Lightweight EVA foam midsole for stability and comfort. 30% recycled rubber outsole .