This 4 Layer Soft Air-pressure Neck Traction is very comfortable and easy to use for Pain Relief. * This Cervical Traction is designed to maintain the natural curve and alignment of the neck for your health. * Extra Cervical Traction Power , perfect for you if you need extra traction power or have longer neck. * Traction Length Maximum: 11 Inch (28 CM); Treatment Time:15-30 minutes. * Home Use Only for Relief and Relax, not for Professional Treatment or Contact Your Doctor Before Use.