From Chubbies, these swim trunks feature: A classic stretch Elastic waistband trunk with built-in mesh boxer brief liner Capped flexible drawstrings for extra support with elastic waist 2 mesh side pockets for extra drainage and a back zipper pocket to keep all of your treasures secure They are impossibly stretchy Lightweight, ultra-supportive and anti-chafing to provide breathability and support in those moments when you need it most 4-way stretch Polyester/spandex blend Machine wash/tumble dry Imported.