Made of strong lycra material (UV-Protection 50+ !!!). Suitable for many watersports acitvities like windsurfing, swimming, snorkeling, waterskiing ... This shirt is also a good combination to your sports fashion.lycra material (UV-Protection 50+ !!!). Suitable for many watersports acitvities like windsurfing, swimming, snorkeling, waterskiing ... This shirt is also a good combination to your sports fashion.