Boot Height: Approx. 10'' Tall. 3/4 welt construction gives all the comfort of cement construction with the durability of a wel. 800 grams of Thinsulate Ultra Insulation. Air flow chamber ankle cushion allows unrestricted breathability and comfort. Air-port cushion footbed circulates air with every step. Durably Waterproof and Breathable Gore-Tex Fabric. Five layer MtnStalker outsole was designed to enhance natural foot perofrmance. TalusFlex technology maximizes mobility. Techno-Stability cradles and protects foot and ankle against twists without limiting articulation.