Men’s trunks Semi-sheer men’s underwear made from nylon/spandex Machine wash Imported Urban Basic underwear style UBL002 A delight to wear, these semi-sheer men's trunks from Urban Basic are sexy and super comfortable too. Made from a very special fabric that blends nylon and spandex fibers, the Urban Basic Zenia men's trunks are delicately knitted to display a semi-sheer shadow stripe with intricate patterns. The nylon blend of this Urban Basic underwear is inherently stretchy, making these some of the best-fitting trunks you will ever own.