SPEEDO Luchadores 2 Silicone Swim Cap Elastomeric Fit. Interior textured surface keeps cap in place. Soft stretchy silicone provides optimum comfort. Quick and easy on-and-off design won't snag hair. Latex-free. Introducing Speedou00ae Elastomeric Fit, the first silicone swim cap specifically designed for fitness swimmers. Elastomeric Fit offers greater elasticity and more comfort that traditional performance caps.