Ergonomically designed 4-piece orthopedic wedge pillow set for sleeping, post-surgery recovery, back, neck and knee pain relief. Made with high-density memory foam and soft velvet fabric for all-night comfort. Each piece can be used separately or together to support your head, shoulders, arms, back and legs. The adjustable design helps relieve acid reflux, sleep apnea, edema and pressure points. The removable cover is machine washable with an invisible zip, and a non-slip base keeps everything in place. Suitable for bed, couch or floor use.