Modular system boot, use with outer footbed in camp or without when sleeping. Designed to keep your feet warm at night or when lazing around camp. Weight:640g Colours: Black/Gold Sizes:S-XL Size Chart: 90 goose down fill power 660+ Pertex ® Endurance outer Double lined boot construction Detachable outer footbed with velcro fastening Velcro Fastening 12mm closed foam insulation midsole Shock cord adjustment at hem Modular system use with outer footbed in camp use without when sleeping Men's Size