Polyurethane Foam | Help Relief neck pain in just 10 mins a day. | The neck and shoulder relaxer is ergonomic design, the curve of neck relaxer matches the cervical spine. When you lie down, it offers vertical, horizontal support, and Curvature stretch for neck traction, allowing the cervical traction pillow to position the head to reduce spinal pressure, support the cervical spine and help restore the C-shaped curve of the neck. | Restclouds stretch (traction) your neck giving relief from neck pain and headaches. They are portable, comfortable and easy to use. All you have to do is lay down on it, relax on it and feel the stretch! Simple and effective physical solutions to sooth away stiff neck, helps in restoring proper cervical curvature associated with consistent use. | Cervical neck stretcher can be used on hard surfaces, such as home floors, outdoor flat ground, yoga mats etc. Can't be used as an ordinary pillow all night long. 10 minutes per time, no more than 30 minutes a day. | This neck stretcher should never cause pain, however some slight discomfort may be felt initially when using this device. There are many varying conitions of the vervical spine, improper application of this device or the use of excessive time on this device may aggravate an existing condition or cause additional injury. If you feel pain, numbness or dizziness, immdediately discontinue using device and consult with your healthcare professional.