Sunny out? There's UV resistance. You're sweaty? There's sweat-wicking tech. On its own or worn as a layer, this top has soft and stretchy fabric for a comfortable feel. [] Product Details:Body:88% polyester/12% spandex. Mesh:74% polyester/18% lyocell/8% spandex. Slim fit. Mesh under arm panels. UV protection. 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. Machine wash. Imported. Style: IO0232; Color: Black/Anthracite/Summit White; Size: 4XL; Gender: Male; Age Group: Adult | Nike ACG Wildsee Men's Dri-FIT Long-Sleeve Base Layer in Black, Size: 4XL | IO0232-010