Black mesh fabric round cushion with a breathable design. The back has a non-slip treatment. Purchased on Rakuten for ¥6,880. Size is 45cm outer diameter, 6cm thickness. It's larger and thicker than usual. I've used it for about a week, and it has excellent cushioning. Usage frequency is low, and it's in very good condition. - Color: Black - Material: Mesh fabric - Features: Circular design with a hole in the center - Zipper: Zipper on the side Thank you.