Thank you for viewing. Half Track Products Non Sleep Cushion. This is a lucky item I purchased on the day of the restock. The size is 65cm, so it can store a somewhat large winter sleeping bag. The outer fabric is sweat material. The back side is a dark navy corduroy material, close to black. □Size Spec・ONE (Diameter approx. 65cm) Material・Cotton, etc. I have used it several times for camping. There are stains, so please check the images. Thank you.