Ex Officio Give-N-Go Sport 2.0 3 Inch Boxer Brief (2416717). The ExOfficio Give-N-Go Sport 2.0 3 Inch Boxer Brief 12416717 builds on 20 years of development and tech fabric improvements to give you an even more breathable underwear that rapidly wicks sweat, has full range of motion multi-directional stretch, and odor protection so that fabric doesn't retain lingering scent. ExOfficio's Give-N-Go Sport 2.0 3 Inch Boxer Brief is made of nylon/spandex.