The Carex Memory Foam Cervical Roll Pillow has an ergonomic design to support comfortable sleep posture and spinal alignment and reduce head, neck, shoulder, and back pain. This versatile cushion can be used behind the neck as a traditional pillow or as a travel pillow, or under the knees, back or ankles, to provide additional support as a bolster pillow. Made from premium high-quality memory foam that immediately reacts to provide instant pressure relief, the pillow?s premium foam also rebounds slowly for long-lasting support. Our attractive navy blue cover is hypoallergenic and made of soft polyester and rayon. The removable cover is machine washable, so you can easily keep the cushion clean between uses.