Size: Standard Brand: AooDen Shape: Rectangular 【Ergonomic Design & 4-Area Structure for Ideal Sleeping Posture】 This pillow adopts a three-dimensional design and a 4-area structure based on ergonomics to keep your head, neck, and shoulders in a natural position. The head stabilization zone, cervical spine curve support zone, shoulder fit zone, and others work together to maintain the correct posture while you sleep. This reduces the burden on your neck and shoulders, leading to natural and comfortable sleep. 【High-Density Memory Foam for Firm Support】 The pillow is filled with 60D high-density memory foam. The slow-rebound, soft feel disperses pressure on the head and neck, reducing localized strain. It also has excellent durability, resists flattening even after long-term use, and maintains stable support. There is little change in firmness due to the season, providing a natural and smooth sleeping experience. 【Selectable 2-Level Height Design】 The pillow has two height levels: 5.5cm (low) and 10.5cm (high) on both sides. You can choose the height according to your preference and sleeping position (back, side, or stomach), making it easy to adjust the fit to your liking. Anyone can enjoy comfortable sleep at their ideal height. 【Easy for Any Sleeping Position】 The design of the central indentation and the curves on both sides firmly and gently supports the head, neck, and shoulders. When sleeping on your back, it maintains a natural curve and supports the neck. Also, the sides of the pillow are high, so when sleeping on your side, your head naturally rises, your center of gravity becomes straight, and your airway is secured, making breathing easier. 【Breathable Pillowcase】 The pillowcase uses a cooling material, providing a comfortable feel and reducing stuffiness. Furthermore, by providing ventilation holes in the fabric, air circulates smoothly, keeping you cool and comfortable even during long hours of sleep. The pillowcase has a zipper and is removable, easy to clean in the washing machine, and can be used cleanly at any time. 【About Use and Care】 Because the memory foam pillow uses memory foam, you may notice an odor immediately after opening.