COVERAGE FOR TRAINING IN THE SUN. The Nike Essential Swim Shirt offers sun protection to help guard against UV rays while you're training outdoors. Knit fabric gives this shirt natural stretch for a comfortable fit, while sweat-wicking technology helps to manage moisture. Benefits: 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 from the sun only in the areas covered by the garment. To protect exposed areas, the use of good quality sunscreen is recommended. Product Details: Standard fit for a relaxed, easy feel. 100% polyester. Hand wash. Imported. Style: NESSA587; Color: White; Size: M; Gender: Male; Age Group: Adult | Nike Essential Men's Long-Sleeve Hydroguard Swim Shirt in White, Size: Medium | NESSA587-100