Type of sport: Swimming Size: M Navy ■Material/Features [Silicone] M (50cm - 55cm) L (54cm - 59cm) This is a soft racing cap developed for top swimmers, approved by FINA. The surface of the material is textured to reduce water friction by approximately 12% compared to conventional caps, supporting the swimmer's performance. In addition, a special silicone material is used, increasing the elongation rate by approximately 1.5 times and reducing the feeling of tightness. Furthermore, the inside is treated with a non-slip finish to reduce slippage during dives. Competitive swimming High-speed swimwear Racing cap