Triangular cushion-shaped backrest cushion. Features a height-adjustable, foldable design, supporting reading, watching TV, and comfortable sleep on beds and sofas. The high-resilience and low-resilience two-layer structure provides comfortable pressure distribution, also functioning as a pillow for acid reflux. The washable backrest cushion cover and non-slip features ensure comfortable daily use. 【Height Adjustment for the Ideal Backrest Cushion Experience】 The triangular cushion structure backrest cushion allows height adjustment with snap buttons. Adjust the angle between 23-30cm to your preference. This cushion is comfortable to use on beds and sofas. 【Comfortable Support - Also Ideal as a Pillow for Acid Reflux】 The triangular cushion, which also serves as a backrest cushion, has a gentle slope that makes breathing easier. As a pillow for acid reflux, it gently supports the upper body and reduces the burden on the lower back, neck, and shoulders with its high-resilience pillow design. People with larger builds may find it difficult to sleep on their backs, and may worry about the burden on their heart when sleeping on their sides. This pillow adopts an optimal angle to support a comfortable sleeping posture. Important Notes: The price includes shipping, but separate shipping fees apply for Hokkaido, Okinawa, and remote islands. In such cases, we will adjust the price, so please notify us in the comments before purchasing. For shipping to areas other than the above, you can purchase immediately. Please refrain from comments asking for price reductions.