Nike Dri-FIT technology moves sweat away from your skin for quicker evaporation, helping you stay dry and comfortable. This product provides UVA and UVB protection ( UPF 40+) from the sun only in the areas covered by the garment. To protect exposed areas, the use of quality sunscreen is recommended. Designed to be worn over a swimsuit for added protection. Heat transfer swoosh , loose fit feels roomy and relaxed.