Block harmful UV rays in this fast drying Evolution Sunblock T-shirt. You get UPF 50 so you can stay out in the sun for longer. The collar has been updated to be as fast drying as the rest of the shirt so you stay comfortable. Whether on the boat, at the marina or out walking in the country, this cotton/polyester top is ideal for your low to medium energy activities. This is a certified bluesign® product. Compare prices from: Musto in Men's Clothing