The Pro Flex is engineered to move with minimal friction and complete comfort. These Boxer Briefs feature The Original 3D Pouch to ensure everything is separated and supported, so you can always put your best foot forward. The fabric is a breathable, moisture-wicking polyester blend mesh featuring Ionic+® anti-odor technology that does not wash out. Fabric: 89% Recycled Polyester, 11% Spandex M121035