Updated for more underfoot comfort and a lighter weight, the Women’s Chilkat V 400 Waterproof Boots still boast our warmest package of Heatseeker™ Eco insulation for comfort on cold winter adventures. 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.