The cure for absolute fridged weather, the Kenetrek 13 inch NORTHERN boot gives you the snug fit and comfort of a walking boot with all day support and total warmth. Comfort rated to -20 degrees thanks to the quilted three layer removable liner with 400 gram Thinsulate Insulation and 3mm of wool felt. An addtional 600 grams of Thinsulate Insulation and 9mm of wool felt are sealed inside the rubber bottom for maximum warmth. K-Talon outsoles provide sure grip in icy conditions. The 13 inch NORTHERN is a true below zero boot that is still comfortable to walk in. Women order 1 1/2 sizes smaller. Made in Thailand.