Patagonia Men’s sender Boxer Breifs Underwear Size XL EUC We can't think of a better way to start a busy day than in the comfort of our Sender Boxer Briefs. Made with a laser focus on materials, fit and support, they 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 chasing the day's last train. The bulk-free fit has ergonomic patterning and a stay-put leg design to keep them from riding up or constricting. Flatlock, chafe-free seaming throughout and a contoured pouch for frictionless support provide greater comfort. Sender Boxers Briefs are also Fair Trade Certified sewn, which means the people who made them earned a premium for their labor