Knit upper 100% recycled laces and webbing 100% recycled mesh lining 100% recycled mesh lined removable EVA insole Molded nylon arch shankRock plate for protection 10% recycled EVA foam midsole Merrell mountain-grade Quantum Grip rubber outsole Merrell is focused on merging performance, styling, and comfort to empower all people to confidently explore the outdoors Merrell Air Cushion in the heel absorbs shock and adds stability