Abstract: A pair of workout pants having an integral undergarment tacked or fastened to the outer garment at a number of tacking or fastening points spaced along an upper periphery or upper margin of the underwear. In various embodiments, the outer garment may comprise full length, Capri style, or biking shorts length exercise pants preferably made out of moisture wicking material, cotton/spandex, or cotton/lycra, and having thong or brief style underwear built into the pants. The underwear are preferably tacked, buttoned, snapped, or otherwise fastened into the pants in five (5) locations—two (2) points in the front and three (3) in the rear. During exercise, the underwear is held in place relative to the outwardly visible upper edges of the garment so that the underwear remains substantially covered by the outer garment.