This is the pain relief system that elevates the knees and flattens the spine to alleviate stress on the lower back. With an integrated vinyl bladder that inflates to the desired firmness, the system’s knee pillow can be tucked under and between the knees—thanks to its beveled edges—while sleeping on the back or side to reduce tugging on the pelvis and relieve lower back muscle tension, allowing you to wake up rested and refreshed. The system’s head pillow cradles the head, shoulders, and neck in the proper ergonomic position. The knee pillow’s vinyl bladder is surrounded by soft polyester, the same filling used in the head pillow. Can be used with standard pillowcases. 26" L x 20" W x 12" D. (3 lbs.)