NRS H2Core Rashguard SS Shirt - Men's Provides advanced protection against sun and abrasion for surfing, SUP, kayaking, rafting and other active water sports UPF 50+ Performance cut allows unrestricted movement and creates friction-free zones under the arms for comfortable paddling Nylon/spandex technical fabric wicks moisture away from the skin and dries quickly for cool comfort on the water The silky exterior ensures fluid, athletic performance while the brushed inner surface feels soft and cool on your skin