For those who are struggling with stiff and nervous muscle, we highly recommend you this versatile 33*14cm Hollow Foam Roller! Made of non-toxic foam, it is an excellent tool for muscle relaxation all over the body as well as yoga practice. By gently rolling the rod, you’ll feel that its uniquely designed bumps deliver comfortable, relaxing massage to sooth your muscle and relieve fatigue. Portable size allows you to carry to the gym or outdoors conveniently. Don’t hesitate to get one!