Comfy Curve™ is perfectly contoured to hug the S-curve of your spine in order to relieve pressure and ease lower back pain while you sleep, sit or drive. The world’s most comfortable back support pillow, it has an attachable lumbar insert with a supportive microbead core so you can instantly customize the pillow for total comfort. The ultra-plush memory foam design features a breathable, stay-cool fabric cover that’s removable for machine washing. Foam & polyester. 16″L x 8 1/2″W.