Boot Height: Approx. 9'' Tall. 1,000 grams of Thinsulate Insulation. 3/4 welt construction TechnoStability cradles and protects foot and ankle against twists without limiting articulation. 5-layer MountainStalker outsole is designed to enhance naturatl foot performance. AirFlow chamber ankle cushion allows unrestricted breathability and comfort. Airport Footbed Provides Support and Cushioning. BoneCage Technology, a webbed design of protective overlay on both sides of the boot structure and protection against scrapes. Durably Waterproof and Breathable Gore-Tex Fabric.