Features of the Therapeutica Sleeping Pillow: Unique, tri-level design incorporates two correct pillow shapes into one pillow to provide correct spinal alignment whether sleeping on our back or side. Surface channels provide air circulation. Soft, molded foam is non-allergenic and environmentally friendly. Wedge extension supports your upper back. Cervical contour maintains the natural curve of your neck. Center cavity cradles head for optimal support and comfort. Raised side sections accommodate shoulder height. Contoured head rests keep your head and neck level. Side cavities provide flexible cushioning; ensuring jaw comfort, which is essential to TMJ sufferers. Once removed from original packaging this item is not returnable.