Premium antibacterial memory foam, cradles to your body shape in response to heat and pressure, rebounds slowly and distributes body weight evenly; medium-to-soft firmness feel.it promotes natural traction for the neck and smooth breathing to reduce snoring, improving the quality of the sleep; it effectively supports your head, neck, shoulder & upper back, relieves pain & pressure and promotes spinal alignment.the center cavity ideally cradles your head, the wedge extension supports your upper back, and the cervical contour helps to maintain the natural curve of your neck; side sleepers should rest on the 2 convex side panels.