Men's Simms Challenger Insulated Rubber Boots 694264-14020 The top wet-weather contender of the Challenger footwear lineup, step into the Challenger Insulated Boot for warmth-firing, waterproof performance that crushes the season's coldest. Features Non-marking outsole Simms Freestone rubber outsole offers traction in a multitude of environments and is fully compatible with Simms Hardbite Studs, Cleats, and Alumibite Cleats Vulcanized rubber outer, 7mm of neoprene insulation, and grid fleece lining 14" total height for over-the-calf protection Pull-on loop for easy on and off Men's Simms Challenger Insulated Rubber Boots