Kiefer's Silicone Swim Cap features a special head grip design that shapes perfectly to swimmer's head for a secure and comfortable fit. This durable silicone cap is UV resistant and has a nonslip interior that improves tear resistance. Compare swim caps made by Speedo and TYR, and see that Kiefer's great quality is also available for a great price. Kiefer - The First Name in U.S. Swimming since 1947.