The Nimbus Boot is the top-of-the-line backcountry snowmobile boot. This premium snowmobile boot utilizes 1200 grams of insulation and the Sympatex® membrane for unprecedented waterproofing and warmth. The revolutionary 2-in-1 design of this boot offers incredible functionality. First, the inner boot is soft and well-cushioned for a comfortable ride straight out of the box. Plus, after a few hours wearing this boot, the natural heat given off by your body custom-molds the inner boots to the shape of your feet. Details: Sympatex® 45,000mm Insulation: 1200g 100% windproof 100% waterproof Optimal breathability Reinforced seams Thin profile Durable high grip Eternasole Heavy duty materials Moisture wicking liner Removable inner boot Dual zone BOA® system BOA® coiler dial on tongue BOA® highest-tensile strength SS2 lace Snowbike shifter friendly toe Metal D-ring for boot gaiters