First on, last off, our exceptional, moisture-wicking Sender Boxers provide an unsurpassed foundation for any active day. Made with a laser focus on materials, fit and support, Sender Boxers have a moisture-wicking micromesh fabric of recycled nylon and spandex that feels airy and light, stretches when you move, wicks moisture and dries in a flash. We added an anti-roll comfort waistband that stays put without pinching, binding or chafing, even when you're running to catch the day's last train. The bulk-free fit has ergonomic shaping and patterning to keep these boxers from riding up or bunching. Flatlock, chafe-free seaming throughout means all-day comfort under a harness. Sender Boxers have a fully functioning fly and are also Fair Trade Certified sewn, which means the people who made them earned a premium for their labor.