Our pillow has 2 different contour heights on either side， so you can choose whichever works better for your sleep posture. Butterfly design shape gives armrests， no more arms numbness . The pillow offers enough room for your shoulders and makes good nasal airflow for sleepers . The hole inside was designed to cradle your head for optimal support and reduce the pressure of the skull. It allows for a comfortable yet supportive night's sleep. The unique nontoxic ， non-allergenic， molded foam design. The cervical pillow is made with high-quality rebound memory foam that is CertiPUR-US certified. Its temperature sensing， making the pillow FITS YOUR NECK perfectly. The best pillow for neck and shoulder pain is firm enough to hold the head at a healthy angle， but soft enough to alleviate pressure points. Choose us， the symbol of all-nature and great support. Pulatree cervical pillow are built with double breathable pillowcases . It is removable with zippered & machine washable . Pillow is made from hypoallergenic cotton and polyester with its soft and breathable fabric that allows air to circulate through the pillow all night long. It is gentle on your skin to stay crisp throughout the night - it retains moisture absorbency qualities to leave you from night sweat in a comfortable climate.