FEOYA Men Fitness Swimming Trunks Swim Boxer Brief Sexy Swimsuit Square Cut Swimsuit ATTENTION - Asian size is smaller than U.S size, Please Check Amazon's Size Chart and bought the size on the U.S size GOOD FLEXIBILITY - Elastic waist,good flexibility allows you easily move around in QUICK DRY AND SOFT ENOUGH - Shell:82% Polyester mix 12% Spandex;Lining: 95% Polyester mix 5% Spandex,provide you more comfortable,less uneasy PROFESSIONAL JAMMER SWEIMSUIT - Low Rise, fitted design,good stitching, if you prefer a looser fit, go up a size