No more bulky separate undergarments — this 2-in-1 lower back support brief provides all-day comfort. As its front panel smoothes your abdomen for a slimmer look, its firm control supports your lower back for better posture and less strain, discomfort and fatigue. Brief and back support in one. Lumbar support briefs provide a smooth, discreet fit under any clothing. Cotton crotch for breathable comfort. Choose from 5 sizes: medium, large, XL, 2XL, 3XL. 80% nylon/20% spandex. Hand washing recommended, no bleach.