PREMIUM MATERIALS - This neck support pillow is made of premium memory foam will not lose shape over time easily, and while comfortable and soft they are also dense enough to offer unparalleled and balanced support and cushion. It is covered with an inner cover and an outer pillow cover. Also, the breathable outer cover is with a zipper, it is easy to remove and wash.THE MEMORY FOAM ITSELF WILL HAVE A VERY LIGHT SMELL, IF YOU ARE UNACCEPTABLE, PLEASE VENTILABLE IT FOR 3-5 DAYS UNIQUE GEL LAYER - The gel layer on one side provides extra support for your head.The blue gel forming an open heat exchange channel between your head, gel, and air through the gel units, forming a constant temperature environment. This pillow helps you fall asleep fast and makes you sleep well during a long night. ERGONOMIC DESIGN - Our neck pillows for pain relief sleeping are suitable for all sleepers, especially for back and side sleepers. Its ergonomic contour design conforms to the natural curve of your body, and the proven contour design perfectly supports. Also, the pillow for neck pain aligns your head, neck, shoulders, and back. You will fall asleep faster and deeper. WIDE USE - The memory foam pillow is the best pillow for neck pain, both for side, back, and stomach sleepers. The innovative contoured, cervical, gel design and memory foam, provides incredible support for spine alignment. Tips: If you've never slept on this shaped pillow, it will take about 2 weeks to get used to the correct position