Bridge-shaped Lower Back Stretcher,the outline in a standard human curve, helping the misaligned spine to return to its normal position and relax the waist muscles. The middle silicone pad provides cushioning to ensure that the spine feels comfortable. There are 10 magnetic dots and 98 plastic massage dots on the lower back stretcher, which can effectively offer acupressure to the waist, helping loosen up the tight muscles. It can also help to correct postural imbalance and let spinal return to the natural curvature.Back massage stretcher has 4 slots for height adjustment to fit people of different ages and abilities. The higher the arch of back support, the stronger the stretching force is, so fix back stretcher device at the most comfortable and recommended to start with the flattest level. Spine Stretcher is a home Sciatica Pain relief Treatment, it is lightweight and required no batteries, so it is portability enough to carry and store,you can enjoy it in home, car, gym,office and everywhere you want. Using this Lumbar Back Stretcher about 5-10 minutes once for Lower Back Pain, or just using it as a daily seat waist cushion to keep Spinal Decompression and health Material: ABS Size: 38 x 25cm