High-density slow-rebound sponge (memory foam): This butterfly-shaped neck pillow is made of high-density slow-rebound sponge, making it softer and more durable. It offers strong support and resists deformation and sagging during prolonged sleep. Thanks to the shape-retaining memory foam, the pillow maintains its shape in the long term, perfect for daily use and travel. Scientifically divided zones: This neck pillow has different fit zones for the head, shoulders, and neck, as well as areas for side sleepers. This ensures a perfect fit and optimal head support, regardless of your sleeping position. It offers multi-dimensional relief from neck pain and prevents neck discomfort, even during long flights or car journeys. Highly elastic, breathable pillowcase: The pillow comes with a removable and washable cover that is wrinkle-resistant, durable, and lint-free. The hidden zipper allows for easy cleaning, and the cover is easy to install without hassle – even with one hand. The breathable material ensures a cool and comfortable sleep experience, comparable to bamboo cover technology. Suitable for various sleeping positions: This professional pillow fits the shoulder width for side sleepers, provides support when lying flat, and conforms to your head, neck, and shoulders. When sleeping on your stomach, arms can be placed through the recessed area for hand support. It is versatile, whether you are sleeping at home, camping, or traveling by car or plane. Large design with generous size: This pillow measures 60*41*8.5~10cm. The extra size allows for comfortable turning and fits all shapes and ages, from children to adults.