Men’s briefs Men’s underwear made from cotton/spandex Machine wash Imported Private Structure underwear style 99-MU-1505 A pop of bold color goes a long way on Private Structure Rib men’s briefs. Sleek and stylish, these low-rise mini briefs from Private Structure feature a sexy yet sporty body-contoured fit and plush contrast Private Structure logo waistband. Made from soft stretch cotton, the Rib men’s briefs from Private Structure also boast matching green stitching down the center and sides of the fly-free contoured pouch.