Stretch The Neck Muscles Better: The double-sided knob is different from other single-knob products, as if hands lift your head up from both cheeks with uniform lifting force, which stretches the neck muscles better than hold the chin up, makes the traction effect better.Different Traction: 3 POWER TRACTION 1) Side knobs adjust the height, stretch the neck muscles. 2) Rotate the back knob to fit the airbag to the neck. 3) Inflating the airbag, powerful Traction Air Belt pulling the vertebrae achieves 20 cervical physiological curvature repair.Effective Traction: Ergonomic of neck traction device helps to improve the blood supply for vertebral artery and brain, promotes cervical physiological curvature repair. Please know that will bring the pain initially because of traction. Using 2-3 times per day help you get longtime relief from pressures of the neck pain, tension, muscles spasms.Applicable: Neck Height: 3.2-4.7 inch, Neck Circumference: 13.7 - 17.5 inch. 1) The doctor recommends traction and stretching of the cervical spine (Diagnosis of cervical spondylosis by MRI, X-ray, or CT). 2) Long-term cervical spine compression pain. 3) Numbness in the shoulders and arms. 4) Hear sound when rotate your cervical spine. 5) Traction the condyles of the cervical spine, not fix.Sturdy and Lightweight: The cervical neck traction device make by ABS and PC, light weight, breathable material is not stuffy, and the upper and lower pads can be removed and washed. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''t hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it!