Never worn! Size 7 but probably fits 6-6.5 best The lightweight, waterproof Women’s ThermoBall™ Lace Up Waterproof Boots are secure-fitting winter boots with durable recycled ripstop uppers and warm ThermoBall™ Eco 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.