Great White Shark TrunksBermies boys swim trunks are made out of 90% recycled polyester and 10% lycra which means these swimsuits are stretchy, breathable, fast drying, and, most importantly, extremely comfortable. These trunks also come with a 4 way stretch, 100% polyester, high quality mesh liner, which means you can say goodbye to rashes and wedgies. There are two side pockets and a back pocket with velcro tab and elastic key loop in our best selling kids swimsuits.