Warm and waterproof, this NAVATEX winter boot is as comfortable as it is practical. Insulated with 200 grams of 3M Thinsulate and completely waterproof, this boot will keep your feet warm and dry. This lined boot fits snugly with the laces and is easy to put on with the side zipper. The insole is removable. This boot also features the OC SYSTEM TIPPER system. The outsole has studs that increase stability and grip on icy surfaces. OC SYSTEM TIPPER, with a two-position movable underfoot (GRIP-OFF and GRIP-ON), makes walking comfortable and stable on icy surfaces.