FIT4U MAN! Men's Stars Hybrid Shell: 100% Nylon; Lining: 80% Nylon, 20% Spandex Imported Hand Wash Inside, an ingenious built in boxer short is made up of specially knit fabric and features preventive hygienic technology which is antibacterial, anti odor and quick dry Swim trunks are 100 percent supple and UPF 40+