Get free shipping and sales for the Columbia Sierra Summette Fossil/Cosmo Blue Footwear A stylish, insulated winter boot that is extraordinarily lightweight and packed with high performance features. Water-resistant oiled split-suede upper with a faux fur collar. Front lace-up closure. 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. EVA footbed with nylex cover. The exceptionally lightweight Techlite shell provides waterproof, breathable performance and support. This durable, impact absorbing material is also non-marking, odor-resistant and cleans easily with soap and water. 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.