Please be sure to read the profile. I purchased this exactly 2 years ago for 10,560 yen. The same item is currently on sale for 9,900 yen. Reviews are also very good, so please search on Rakuten or Amazon. I bought this after researching extensively because my old, window-filled bedroom was very cold due to drafts. The color is gray. I found it very useful, especially when placed on the bed near the window, as it kept me very warm. I am selling it because I will be having construction done and no longer need it. This is a 4-door type, so you can get in and out from anywhere, which is convenient. It's also said to be good for pollen対策 and for those who don't like air conditioning. This is size S, so I think it's for a semi-double bed, but it depends on the shape of your bed, so please check and purchase accordingly. I think the size doesn't matter much if you place it directly on the floor. It's also good as a secret base for small children. Recommended for those who have cold homes or are troubled by drafts in their bedrooms. I used it for one season, and it was put away without any particular problems. I haven't checked the assembly because it's quite difficult to assemble, but I think there are no problems. Instructions are included in the bag, and there are also videos. The fabric surface was mainly used by adults, and there are no noticeable stains, but there may be minor scratches. I would like those who don't mind to purchase it. Tasumi Heating Tent tasumi Indoor tent