Great for wearing in and out of the water, this Heathered Ventx top is rated Ultraviolet Protection Factor (UPF) 30 for Very Good sun protection, blocking over 95% of harmful UVA/UVB radiation from the sun. Moisture wicking, quick drying, and lightweight with a slim t-shirt fit. Recommended for nearly all watersports and outdoor activities, especially surfing, outrigger and stand-up paddling, running, and more.