【COOLING PILLOWCASE】 The pillow is equipped with a double layer of inner and outer pillowcases. The outer pillowcase is made of cooling fabric that is both skin-friendly and breathable, creating a pleasant cooling sensation on the skin, so you won't feel too hot or humid all night. 【LONG-LASTING USE CYCLE】 The pillow's breathable inner cover can effectively extend the lifespan of the memory foam core. The outer cover is removable and machine washable, but do not wash the memory foam core. Store the memory foam core in a cool, dry, ventilated place away from sunlight and avoid direct sunlight. 【HIGH-QUALITY MEMORY FOAM PILLOW】 This pillow is made of high-quality memory foam, the pillow's height changes depending on individual sleeping position, head size/weight, shoulder width (side sleepers) and stays at the most comfortable level. They are soft and supportive, allowing you to sleep comfortably and protect your neck and shoulders. 【REDUCTION OF NECK AND BACK PAIN】 The ergonomic and contoured design perfectly supports and maintains the fit for your head, neck, and shoulders. The grooves adapt to the contours of the head and neck to support the head and neck, reduce pressure on the cervical spine and vertebrae, relieve neck and shoulder pain and discomfort so you can sleep faster and better and improve the quality of your sleep. 【ERGONOMIC CONTOUR DESIGN】 This pillow is designed with scientific ergonomic contours, perfect for back sleeping, side sleeping, stomach sleeping, and other various sleep needs. It provides support for your sleeping habits.