1. Warmth Protection: Our 3mm neoprene diving hood can keep your head warm and comfortable, prevent rashes, and offer protection. You can enjoy wonderful moments with less worry. Also, this swim cap can keep your head warm when you're paddleboarding in cool water. It fits well and dries relatively quickly, being suitable for various water sports. 2. Sun Protection: This diving cap has good UV protection, shielding you from harmful sunlight during water activities. It can also protect your head from sea lice, jellyfish, coral, etc. 3. Adjustable Design: The swim cap is equipped with an adjustable chin strap and a double - locking mechanism of hook and loop fasteners, which helps ensure that the hook and loop of the chin strap are firmly fixed. This adjustable diving cap is generally one - size - fits - all and suitable for both men and women. Moreover, it's easy to tear open, making it convenient for quick donning and removal. 4. All - round Protection: Whether you're surfing, diving, swimming in open water, scuba diving, water skiing, canoeing, kayaking, doing board sports, or sailing, this neoprene diving hood can help protect your head from cold winds, cold water, jellyfish, or sharp rocks.