Inspired by our iconic Base Camp Duffel, the Base Camp 100 Waterproof Boots are insulated boot with THERMOBALL™ insulation, have an EVA shell for protection and feature a high-traction Vibram® outsole. Our waterproof footwear incorporates a variety of advanced waterproofing materials, treatments, and processes. To help keep feet dry, we use internal waterproof membranes and/or adhesive and seam-seal constructions.