Cylinder Therapy Bolster with Cover is a high density foam that helps position the user in their correct position. It is ideal to use in physical therapy, or when exercising at home. This bolster has multiple uses. It can be used for massages, yoga, therapy, stretching, sleeping, exercising, and more. This bolster is great to use while recovering from surgery or an injury. Overall, it is soft, yet firm enough to provide the perfect amount of cushioning and stiffness. ? WARNING: Cancer and Reproductive Harm