The Nokian Kaira is a durable, traditional winter rubber boot with a removable felt liner. Perfect for ice angling, ski trekking, forest walks and even just taking the dog out for a walk. The warmth of this kind of boot is based on the fact that it does not press your foot at all, and allows your foot to move naturally. - Material: durable and UV resistant synthetic butyl rubber - Removable felt liner (shown in extra image) offers insulation and is easy to dry - Heel, toe and side reinforcements - Impact-absorbing heel structure - Compatible with the Kuusamon eräside ski binding - Steel shank gives a bit of strength around the heel area, but the boots are flexible more than anything else - Wide, large last - The soles can be fitted with metal studs for use on ice (studs not included) Please refer to the inner measurement chart shown in the extra image.