Wedge pillows are intended to provide relief for acid reflux disease or acid indigestion. They can also be useful in helping reduce swelling, pressure, muscle tension. Elevation of the head and body can provide breathing relief, provide relief for swelling from injury or surgery, and promote better circulation. SLEEP on it shows two different wedge pillows: 7½” and the 10″ version. The 10″ version has a layer of gel memory foam for additional comfort. Each can be used upright or flat.