VERSATILE TRACTION: Customized traction on the fly; easily change soles as conditions or terrain demand. WATERPROOF: 100% Waterproof breathable bootie construction combined with waterproof leather keeps feet bone dry. INSULATION: 400g of 3M Thinsulate insulation for the ultimate warmth during intense adventures like snowshoeing and hiking. DURABILITY: Protected Stitching around the heel for prolonged thread life & reinforced rubber toe cap for added abrasion resistance. FIT SYSTEM: BoaM4 Fit System for fast and effortless on/off and custom fit. STABILITY: Molded heel counter delivers superior support without sacrificing flexibility. COMFORT: Premium shock absorbing polyurethane footbed. TEMP RATING: Comfort rated down to -30 Degrees Fahrenheit. WATERPROOF, INSULATED COMFORT IN A HIKE-INSPIRED PLATFORM.