Finally - a pillow specially designed for the comfort of CPAP machine users! During side sleeping or stomach sleeping, the CPAP mask can often press and rub against your face, which leads to discomfort. This can also distort the mask, causing leaks and inability to use the mask properly. The CPAP Sleep Aid Pillow's unique design helps eliminate these problems. The contoured pillow allows you to sleep as you are most comfortable, without discomfort.