Pulatree Cervical Memory Foam Pillow for Neck and Shoulder Pain, Ergonomic Orthopedic Sleeping Neck Pillows for Side Sleepers, Back and Stomach Sleepers (Size : Queen)The pillow has 2 different heights 3. 7in&4. 9in, so you can choose whichever works better for your sleep posture. The sleeping pillow design shape gives armrests, no more arm numbness and offers enough room for your shoulders. The center hole is designed to support your head for optimal support, reducing pressure on the skull and ensuring proper spinal alignment. Also, it makes good effect to get a nasal airflow for back sleepers to reduce snoring.