The center of the pillow is an innovative hollow that fits the back of the head, with the slow-rebound material softly adjusts to follow the contour of your head, adapting to optimize for spinal alignment. Along the bottom edges of the pillow are subtle cutaways that fit the shoulders, relieve tension on the lower neck. Have you gotten up with neck pain and back pain? The unique shape and design of the IKSTAR orthopedic sleeping pillow creates the perfect space for resting a tired head, relieves pressure points and improve circulation, helps to eliminate nightly pain caused by improper sleeping. IKSTAR memory foam orthopedic pillow is made of premium memory foam, non-toxic, odorless. The foam with a Special breathable pillowcase works to dissipate heat, allowing cool, fresh air to move through with ease to maintain the ideal temperature. Out of the box, do not need to air out it, just take it to live on your bed. IKSTAR bed pillow 25*16*5.3/4.2in (63.5*40*13.4/10.66 cm). Perfect for different sleeping postures like sleeping on your back, side, perfected by us for a night’s rest. Please measure the distance from the base of the neck to the outside tip of the humerus bone to make sure the size suit you proper. We offer a 2-year warranty and additionally a 30 day no questions asked refund policy for all our customers. If you're not 100% satisfied, please contact us to return your pillow for a full refund.