Improve Sleep Quality: SAHEYER neck pillow is made of high-quality memory foam and proven design perfectly supports and aligns your head, neck, shoulder, and back. Ergonomic Design: The ergonomically shaped neck central cavity. The pillow also features a special armrest, providing full support to your shoulders and arms Premium Safety Memory Foam: The neck pillow is made of high quality CertiPUR-US & Oeko-Tex certified rebound memory foam that meets strict safety and quality standards. 5s rebound memory foam will "remember" the curve of your neck and adapt to your shape Breathable and Washable Pillowcase: The cervical pillow’s cervical spine cover is made of ultra-comfortable, breathable fabric with mesh sides to maintain an ideal temperature and extend the memory foam core's life. Removable and machine washable cover Warm Tips: If you‘ve never used a pillow like this before, you may experience some discomfort during the first two weeks as your body tries to adjust to the correct position.