Design: 100% recycled breathable mesh upper and lining, and footbed cover 100% recycled laces and webbing Bellows tongue keeps out debris External rear sling locks in the heel Cleansport NXT™ treated for natural odor control In-Shoe Comfort: 30% recycled integrated EVA foam insole adds comfort Merrell® Barefoot 2 construction is designed to keep the foot in a natural position Durability & Traction: Vibram® 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): 6mm/6mm; Drop: 0mm; Lug: 2mm Weight: 11 oz / 300g (full pair)