Design: Waterproof membrane seals out water and lets moisture escape for all-day, breathable protection 100 grams Primaloft® Gold Eco Series synthetic insulation Quilted ripstop and synthetic upper 100% recycled laces and webbing Medial zipper for easy on and off Bellows tongue comfortably protects the foot from debris External rear sling locks in the heel 100% recycled pull tab webbing In-Shoe Comfort: Super Rebound Compound midsole with 15% recycled flecks provides durable shock absorption to help reduce torque and allow for a smooth transition into the midfoot FloatPro™ Forefoot and heel cushioning pods 100% recycled breathable mesh lining 100% recycled mesh footbed cover 50% recycled removable EVA foam footbed Durability & Traction: Vibram® Icetrek outsole designed to provide the improved grip on very cold, icy, or snowy surfaces Additional Details: Cleansport NXT™ treated for natural odor control