The D-Core Pillow is named for the D shape in the center. But once you try it, you might think the D is for "Dream."That"s because the D-Core Pillow provides proper cervical support - leading to restful sleep -- at an economical price. This orthopedic fiber pillow"s patented D-shaped center gently supports the head and neck during sleep to help remedy many common ailments, including tension headaches, neck spasms, arthritis and snoring. As a cervical pillow, it complements active treatment in the Correct stage of the TriCare Circle of Health. Once you are in the Maintain stage, the D-Core Pillow helps ensure continued good health by sustaining the proper curve of your neck and spine.Suitable for both back and side sleepers, the D-Core is filled with cool and comfortable Corefill® 100% polyester fiber. Full size and mid-size versions of the orthopedic fiber pillow make it easy to choose the size that is right for you.