▪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