Features1VERSATILE USAGE: Suitable for long term bedridden elderly or patients, pos surgery use for pressure sores, recovering patients, and people prone to bedsores. 2ALL SEASON USE: The front is made of cotton velvet fabric, suitable for autumn and winter seasons, while the back is made of 3D mesh fabric, perfect for spring and summer seasons. 3EVEN PRESSURE DISTRIBUTION: Adopting a zero type design to maintain airflow, it disperses pressure on the areas of use, reducing the chance of bedsores. 43D MESH FABRIC: The removable and washable cover is designed with 3D mesh , it remains cool and breathable, preventing discomfort from heat. 5REVERSIBLE FABRIC: The soft and delicate fabrics on both sides release pressure and prevent bedsores. The waterproof inner liner prevents urine from wetting the cotton core during use.SpecificationItem Type: Donut PillowMaterial: Cotton velvet, 3D mesh, cottonProduct Size: Diameter: Approx. 42cm / 16.5in (manual measurement, there will be 3-5cm error)Package List1 x Donut Pillow