Design: 100 grams Primaloft® Gold Eco Series synthetic insulation Quilted ripstop and synthetic upper External rear sling locks in the heel In-Shoe Comfort: Super Rebound Compound midsole provides durable shock absorption to help reduce torque and allow for a smooth transition into the midfoot FloatPro™ Forefoot and heel cushioning pods Shearling lining adds comfort and warmth 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 Vegan-friendly