【Innovative and Comfortable Design】The ergonomic design of this pillow, with recesses on both sides, provides ample space for your CPAP mask, preventing slipping and leaking. The recess in the center of the pillow reduces pressure on your head and ears, allowing you to enjoy a comfortable night's sleep. 【Available in Two Heights】Designed for side sleepers with CPAP, this pillow is available in 9/11cm heights to perfectly fit the curves of your body, support your head and neck, improve your sleeping position and help you fall asleep more easily. The height of 11 cm is more suitable for side sleepers, while the height of 9 cm is more suitable for back sleepers. 【Customized Comfort】 This neck support pillow is made of high-density memory foam that senses body temperature to adjust its firmness and provide the most consistent comfort. It has a slow rebound feature and does not deform under strong pressure, allowing the pillow to perfectly fit your neck. Note: Do not wash the memory foam