The Nike Swim Shirt is made with sweat-wicking technology to help you stay comfortable at the pool and the beach. The heathered fabric has plenty of stretch for a flexible fit and lets you move freely. Sun protection helps guard against UV rays while you're training outdoors. This product provides UVA and UVB protection from the sun only in the areas covered by the garment. To protect exposed areas, the use of good quality sunscreen is recommended. Standard fit for a relaxed, easy feel 100% polyester. Length 27" Chest 21" Arm opening 11"