This 6'-long mat delivers a deep-penetrating compression massage that soothes sore, stiff muscles throughout the upper and lower body. Seven internal air chambers inflate and deflate to loosen muscles in the shoulders, lower back, and buttocks, while four additional air bladders wrap around the legs and exert a soothing compression. The air chambers inflate for up to 30 seconds and deflate to help improve blood circulation and relieve muscle tension. Unlike vibrating massagers, the mat's air chambers stretch and flex spinal muscles while the 1/3" foam lining contours to the body to soothe pressure points. The mat has three massage programs, two intensities, and you can focus the massage on the upper or lower body using the tethered controller. Plugs into AC. 69" L x 23" W x 2 1/2" H. (16 1/2 lbs.)