... has five angled positions, up to 90 degrees, to choose from so it's easy to find a comfortable reclined position for reading, sun tanning etc. . The interior frame is made of durable, strong aluminum and the covering is removable and washable. The back massage feature is powered by 2 D size batteries that fit under a zippered compartment behind the back rest cushion. There's a flush-mount on / off button for the massage option that's neatly positioned on the right side toward the front making it easily accessible without fumbling or searching. Overall length of the lounger when fully reclined (flat)is 36 inches, meaning the seat is 18 in long and back rest 18 in high; width is 19 inches and cushioning is 3.5 inches thick. Weighs only 4 pounds so it's very portable. Mulit-angle lounger is truly a versatile product that'll last for years.