VERSATILE: OmniTrax 3.0 Interchangeable Sole System adapts your traction to meet changing weather conditions. TRACTION: Includes SnowTrac Winter Rubber Lug Sole WATERPROOF: 100% Waterproof construction includes waterproof/breathable bootie, waterproof leather, webbing, and stitching keeping the foot bone dry. INSULATED: 400g of 3M Thinsulate insulation keep your toes and feet nice and toasty during cold winter weather. FIT SYSTEM: BOA M4 Fit System for fast and effortless on/off and custom fit.