Space saving space for storing mattress inventory.The mattress body 200 and the mattress auxiliary part can be inserted.Includes a mattress cover portion 400 having an insertion portion 410 with a side opening;Mattress cover 400A first connection part 415 and a second connection part 416 which can open an opening part 410 which is opened can be provided.Insert 410The upper surface inserting portion 411 disposed on the upper surface side of the mattress cover partA bottom insertion portion disposed on the lower surface side of the mattress cover part andA lateral side insertion portion 413 disposed on the lateral side of the mattress cover partA vertical plane inserting portion 414 disposed on a vertical side surface of the mattress cover partEquipped withA first connecting portion 415 is provided with a distal end of the upper insertion portionThe base end of the bottom insertion part is connected.A second connecting portion 416 is provided with a distal end of the upper insertion portionThe mattress which connects the tip of the lateral side insertion portion 413.Diagram
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