When using the neck traction devices, its special design provides effective traction that not only immobilises the cervical spine but also decompresses and eliminates pressure and pain between the cervical vertebrae. 20 Degree curve Push and support user’s neck Fit the shape of your neck Ergonomic design Air holes on the back and front to keep your skin fresh. Pu-Abrasion resistance TPU-Good tenacity air sac EVA-Philadelpia cervial collar Maximum Height: 20cm You can use cervical neck traction while you are working, studying or playing with your mobile phone, which can effectively relieve neck pain.