This is a sleep mat that came with the first limited edition analog record of AIR's "Tori no Uta" (Song of the Birds), a limited edition item from Disk Union. This item is now impossible to obtain, making it a rare find. It's great for collectors, or for listening to music or using at anime DJ events. If you're interested, please consider purchasing! This item has been handled by someone else, so please refrain from purchasing if you are sensitive to this. Please understand that we do not accept price negotiations.