Thank you for viewing. This is a MUJI duvet cover. Size: 145 x 205 cm (single size), gray color, 100% cotton, machine washable. The material is soft cotton, not stiff. I used this with a down comforter. I think I used it for about 2 years. I washed it before listing it. * The duvet is secured with snap buttons to loops on the comforter (see image 5). * There is a slit at the top where you can insert your hand from the outside to adjust the position of the comforter (see image 6). This is a used item. Please refrain from purchasing if you are concerned. I do not have any pets. * I will put it in a new bag and ship it via Rakuraku Mercari delivery in a recycled cardboard box or a shopping bag.