Supplex is a registered nylon that was created to have a soft hand (feel) and to be quieter than the swishy sound of many coarser nylons. Our Supplex nylon is breathable, wind and water resistant and very durable. It is treated with a DWR (a Teflon Durable Water Repellent) to make it water resistant. Currently, the factory uses C6—a short-chain fluorocarbon-based chemical.