Design: 100% recycled breathable mesh upper and lining 100% recycled laces and webbing 100% mesh wrapped insole Bellows tongue keeps out debris External rear sling locks in the heel Cleansport NXT(TM) treated for natural odor control In-Shoe Comfort: 30% recycled integrated EVA foam insole adds FloatPro(TM) Foam midsole for lightweight comfort that lasts Merrell(R) Barefoot 2 construction is designed to keep the foot in a natural position Durability & Traction: Vibram(R) Ecostep Recycle outsole designed with 30% recycled rubber which provides added durability and improved grip on wet and dry surfaces Additional Details: Stack height (heel/toe): 14mm/14mm; Drop: 0mm; Lug: 2.5mm Weight: 14 oz / 410g (full pair)