The mens rash vest is a practical, lightweight sun-protection top. the fabric has an upf50+ treatment and is quick drying with flat seams making it ideal for swimming and spending a day outdoors in the sun, or to wear under a wetsuit. Quick drying: thanks to the fabric composition, water dries quickly making it great for holiday. Wear and Washing stretchy: comfortable to wear and for full freedom of movement. Upf 50+: with sun protection factor treatment of 50+. Lightweight: comfortable to wear and ideal for active use. Flat seams: combined with a close fit to prevent chafing and provide extra comfort.