THE COLD WEATHER BOOT CHOICE OF THE US COAST GUARD. 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: 600g of 3M™ Thinsulate™ insulation, for the ultimate warmth during intense winter conditions. DURABILITY: 360ᴼ rand provides superior support and protection without sacrificing flexibility. FIT SYSTEM: Boa®M4 Fit System for fast and effortless on/off and custom fit. PROTECTIVE: Composite toe meets ASTM & CSA testing standards & Lenzi puncture resistant plate protects feet from sharp objects. ADDED SAFETY: Unlike overshoes & other safety cleats with straps, the IceJack Pro's integrated traction design allows for safe operation of vehicles & machinery. TEMP RATING: Comfort rated down to -40 Degrees Fahrenheit. SPECS: 10” height / 4lbs 6oz per pair. SIZES: 7-15 (whole sizes only).