Rotable Design The adjustable roller expands 13.7 inches and retracts only 5.2 inches. Expand size:13.7*5.3*5.2 inches（L*W*H）,foldable size:5.3*5.3*5.2 inches(L*W*H). Weight：2 LBS，you can put it in the gym bag and take it everywhere. Eco-friendly Material This muscle roller is made of ABS+PC+TPE+POM to form stable three-dimensional structure and soft foam surface, which is skin-friendly and durable. 3D Trigger Point One of the best recovery tools physical therapy and exercise , increase body flexibility. The 3D trigger point designs imitating finger massage can relieve pains, knots and tension muscles for comfort and relax. Widely Use Massage roller suitable for runners, yogaer and pilater, dancer, athletes to relieve soreness and discomfort in the back, legs, neck, abdomen and etc. Easy to use for beginners to use at home or gym.