Speedo Men's Diamond Blend Hydro Volley Swim Trunks w/Compression Jammer Outer Shell Short: 100% Polyester; Inset Jammer: 80% Nylon/20% Spandex Imported Comfortable, quick drying and super lightweight rip stop fabric to resist tearing or ripping Built in compression jammer attaches smoothly at waist Mid length 19 inch out seam for fit mid-thigh or above the knee UV block the burn with UPF 50+ offers tighter knit fabric for higher level of sun protection Made by speedo, the world's premier aquatics brand