The lightweight,waterproof Women's THERMOBALL™ Lace Up Waterproof Boots are secure-fitting winter boots with durable recycled ripstop uppers and warm THERMOBALL™ insulation. 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.