Waterproof membrane seals out water and lets moisture escape; Waterproof full grain leather and 73% recycled mesh upper; 100% recycled laces and webbing; Bellows tongue keeps out debris; Protective and abrasion resistant rubber toe cap; 100% recycled breathable mesh lining and footbed cover; Cleansport NXT treated for natural odor control; Removable PU footbed; Molded nylon arch shank; Merrell Air Cushion in the heel absorbs shock and adds stability