Coolibar UPF 50+ Men's Short Sleeve Surf Rash Guard - Sun Protective 100% Polyester Pull On closure UPF 50+ - protects against 98% of UVA and UVB rays Aqua SUNTECT Classic: Chlorine and saltwater resistant with shape retaining four-way stretch Stand-up collar for extra neck coverage Easy care: machine wash, line dry; Imported Recommended for swimming and water sports like snorkeling, surfing and waterskiing