The Arena 3D Ultra Race Cap features increased flexibility and superior comfort with a fit that molds over your head for optimal hydrodynamic in the pool . Features Molded to provide a no-wrinkle fit . Optimizes the hydrodynamic of your head . Easy on-and-off . Details 100% Silicone . Country of Origin Made in China . About Arena: Since 1973, Arena has been a global influence and leader in competitive swimwear and accessories . Used by international top athletes and the official swim teams of UCSD, UC Berkeley, and Cal Poly, Arena swimwear is as synonymous with water as it is to swimming . Arena boasts a number of streamline, comfortable, and durable swimsuits that are perfect for competitive swimming and races . By investing in innovation and researching fabrics and textiles, Arena is continuously discovering and utilizing unique technologies . Their high-tech patented Powerskin fabric claims to be the lightest fabric in production, weighing only 125 grams per square meter, while their stitchless seams keep mobility at its highest and reduces drag . With offices populating Europe, Asia and the US, Arena is making waves worldwide with their quality line of goggles, training equipment and competitive swimwear . Whatever your swim needs, Arena has you covered with their jammers, one pieces, and neck-to-knee suits .