We have free shipping at both ways and greatest sales for the Columbia Sierra Powder Mud/Hawk Tread through the snow and keep warm with the Sierra Powder&trade by Columbia. Rated to withstand temperatures as low as -25 F/32 C thanks to the 200g. Thermolite insulation. Thermolite delivers warmth without bulk, for extreme conditions and everyday activities, providing lightweight warmth and movement. Water resistant nylon upper with synthetic heelstay. Gusseted tongue and front lace-up closure. EVA footbed with nylex cover. Shell consists of Techlite molded material with a nylon shank to provide rigidity and support. The red Omni-Grip outsole is comprised of soft, flexible and firm compounds to provide increased abrasion-resistance for added durability. Designed for winter sports, the Omni-Grip outsole is formulated to maximize traction in snow and ice while resisting colder, harsher temperatures.