Fox Racing Defend Drive Windblock Zip Fleece. Windblocking main body provides maximum weather protection from wind, water, and cold conditions. Polyurethane membrane holds strong against harsh elements, while still allowing moisture vapor to permeate outside. Stretch nylon fabric positioned to give driver free range of motion. Integrated nylon storm cuff seamlessly connects to gloves. Heat transfer. 84% polyester, 12% polyamide nylon, 4% elastane.