Our Travel Size Foam Roller is great for using as a pillow with the Body Track. While rolling your lower, mid back or glutes, this foam roller allows you to prop your head up and read a book or watch TV. Because it’s round and rolls, it’ll move with you as you roll on the Body Track. This is not a high density foam roller, so it will deform in the middle if you use it much with a lot of pressure, say for rolling your shins or hips.