8 MILLIMETERS OF ULTRA-WARM, WATERPROOF, WEATHER-READY NEOPRENE TO COMBAT THE WORLD'S COLDEST REGIONS.. VERSATILE TRACTION: OmniTrax® Interchangeable Sole System for traction on the fly; easily change soles as conditions or terrains demand. WATERPROOF: 16 Inches of 100% waterproof vulcanized rubber construction keeps feet bone dry. INSULATION: 8mm of ultra-warm neoprene with cozy fleece lining for unmatched warmth. FIT: Reinforced heel counter provides performance heel & ankle fit, plus an adjustable top gusset. COMFORT: Shock-absorbing EVA midsole offers underfoot comfort and increased stability and support. ON/OFF: Slip-on comfort with enhanced heel-kick for easy, hands-free removal. TEMP RATING: Comfort rated down to -60 degrees Fahrenheit. SPECS: 16” height / 5lbs 4oz per pair. SIZES: 8-14 (whole sizes only).