■Space-saving kotatsu futon The space-saving kotatsu futon has been designed with the bulky corners cut out, An excellent product that is both compact and warm. It doesn't take up much space and looks neat, but it still keeps you warm enough. The quilt is compact and easy to store. The mattress can be folded up small and is easy to carry! ■ Uses filament yarn This product uses plenty of filament yarn, which is soft and smooth to the touch. The length is trimmed to 18mm and it is tightly woven with a high density, so it saves space but has plenty of volume. The thick pile has a fluffy texture, so once you get in, you might not be able to get out. Both the comforter and the mattress pad use plenty of 18mm filament yarn! The back side of the duvet, which directly touches your skin, is made of short-haired filament yarn.