【Butterfly Button Pillow】, By combining the benefits of a traditional bed pillow and a contour pillow, Our ergonomic hollow contour pillow is here to transform your sleep experience. The hollow concave surface, tilted at a 15-degree angle, skillfully cradles your head, while maintaining the natural curve of your neck and aligning your spine flawlessly. 【 Slow Rebound Hi-Q Memory Foam】: Crafted with high-quality memory foam, it offers a unique slow-rebound feature that provides firm support. This innovative material retains its shape and firmness, ensuring a durable and consistent experience throughout the seasons. 【Customizable Sleep Height】, Our contour pillow comes with two different height options, providing a customized sleep experience, perfect for all sleeping positions. Simply rotate your bed pillow 180 degrees to enjoy a higher or lower contour! The unique armrest design allows you to relax with your arms under the pillow, taking your comfort to a whole new level. 【Detachable Pillowcase】 Neck pillow features a double outer pillowcase for comfort and breathability and skin-friendly sleep. Breathable inner layer protects the sponge, extends the life of the memory foam core. The outer pillowcase could be removed for machine washing 【Tips】Please note that the pillow is not a medical device, please consult your doctor if you have any professional questions. It will take 15 days or more to get used to cervical pillow, and as you get used to it, you will experience the better sleep experience it brings you. gray cervical neck pillow