Our Dynamic Response System, a 360 degree abrasion resistant rubber rand and the Vibram« Tsavo outsole for traction in high-angle terrain, the 48166 Danner Men's Full Curl OPTIFADE Hunting Boots were constructed to tackle rugged, cold weather, mountainous terrain. Designed for use in mountainous terrain, the Full Curl is built on our Dynamic Response System that provides optimal stability underfoot in cold weather environments and is packed with a variety of options including a 1200 Denier nylon upper, a GORE-TEX« extended comfort liner, a 360 degree abrasion resistant rubber rand and 400 gams of ThinsulateTM Ultra insulation. 9" Durable Nubuc Leather and Nylon 100% Breathable and Waterproof GORE-TEX« XCR« Lining Speed Hooks Lace System 400 Grams ThinsulateTM Insulation offering Warmth for Those Needing Protection in Cold Climates Cushioning Antimicrobial Polyurethane Footbed with a Layer of Open Cell Construction for Air Circulation Danner's New Dynamic Response System is Engineered for Optimal Stability Underfoot. The Incorporated Pebax« Framework Allows Springboard Return, Even in Cold Environments, While the Dual-Density Polyurethane Midsole Provides Superior Shock Absorption and Durability GORE-TEX OPTIFADE« Concealment is the First Technology Based on the Visual Capability of Deer, Elk and Other Ungulates, Which Incorporates the Micro and Macro Patterns of the Animal Kingdom to Help Make Hunters Unrecognizable as Predators, Even When Detected Vibram« Tsavo Outsole for Superior Traction in Rugged High-Angle Terrain Environments Abrasion Resistant 360 Degree Rubber Rand 73 oz per pair 48166 Danner Men's Full Curl OPTIFADE Hunting Boots - Brown