Perfect for use on your beach holiday, the Kids Long Sleeved Rash Vest is comfortable to wear, either on its own or under a wetsuit: UV-protective with a nylon-spandex composition, the fabric is light and stretchy giving them full freedom of movement: UV Protect Max: tested up to UPF 50+ Flat Seams: Combined with a close fit to prevent chafing and provide extra comfort Quick Drying. Thanks to the fabric composition, water dries quickly making it great for holiday wear and washing.