Description: Durable MaterialThe diving hood is made of Neoprene, Nylon, stretchable and durable, warm and comfortable, cold and warm, sunscreen, and quick drying. Comfortable WearThe air vent mounted on the wetsuit hood ensures maximum comfort in each dive, so it can be used as a wetsuit hood, surf cap, or swim hat. High Quality Diving cap is carefully sewn for durability, with a chin strap, skin friendly and elastic chin strap can help keep the cap fixed on your head, it is not easy to fall off. Head ProtectionThis Swimming Cap Protects your head and ears from sea lice and jelly. Drainage holes help expel the bubbles gathering on the head. Wide ApplicationsOur 2mm neoprene snorkeling cap is suitable for all water sports like surfing, kayaking, rafting, canoeing, sailing, snorkeling, scuba diving, etc. Specification: Material: Neoprene, Nylon Thickness: 2mm Size Chart: S: Head Circumference 48cm-50cm/18.90-19.69inch M: Head Circumference 51cm-54cm/20.08-21.26inch L: Head Circumference 55cm-58cm/21.65-22.83inch Package Includes: 1pcs 2mm Diving Cap Note: Please allow slightly errors due to manual measurement and different monitors.