Arctix Plus Size Ski Bib Womens Water Resistance: Waterproof--Treated fabrics and specially designed zippers, closures, and seams completely seal out water and rain. Insulation: ThermaTech--Mid-weight insulation delivers premium warmth. Breathable--Allows moisture inside the garment to escape and evaporate. Promotes air flow. Fabric Content: Shell: 100% nylon ThermaLock fabric