Black swim cap, product size: 29 * 29.5 cm. Premium soft silicone: The extra large swim cap is made from high-quality soft waterproof silicone, durable, non-deforming, odorless, non-toxic, eco-friendly, and skin-friendly, providing safe protection for all hair types. Ergonomic design: The ergonomic design fits the head perfectly, reduces pressure, and prevents slipping. With a large elasticity, the cap can easily stretch without deformation and is easy to put on and off without tangling hair. Unisex & spacious fit: Oversized, designed for swimmers with long hair. Suitable for all hair lengths for men and women, such as long hair, thick hair, braided hair, curly hair, etc. Keep your hair secure and tangle-free while swimming. Streamlined shape: A sleek design reduces resistance and creates better speed, helping you swim faster and enjoy a professional swimming experience. Meets most people's needs and is also designed for swimming enthusiasts. Ideal gift: A large black swim cap is an excellent swimming accessory and also the perfect gift for your loved ones, friends, and swimming enthusiasts.