My niece who is a veterinarian gave me a dog liner and blanket when I was receiving PT for a back issue last year. They were so helpful that when the issue recently returned, I bought another one. When I am in pain, I lie down and place a size small one (about 30 inches long) under my back and the extra small one (about 15 inches long) I wrap around the part of my leg that is hurting. Velcro keeps it in place. This relieves the pain, and I feel contributes to my healing. I use the pads in bed at night as well. They provide comfort and pain relief that I can not get from any pill. I am most grateful for Back on Track.