Yonex AC480 Reusable Cooling Face Mask (Black). Yonex introduces the AC480 Face Mask with VERYCOOL technology. Yonex AC480 Reusable Cooling Face Mask Details Material - [Outer Fabric] 90% Polyester, 10% Polyurethane; [Lining] 85% Rayon, 10% Cotton, 5% Recycled Fiber (Cellulose); [String] Nylon, Polyurethane; [Stopper] Polyvinyl Chloride; [Nose Wire] Polyethylene.