This is the keep belt for the Twin Sleep Egg Plus. I purchased it and tried it on, but it didn't suit my children, so I am selling it. The retail price was 7700 yen. If anyone would like to try it out, please do. - Color: Olive Green - Material: Nylon - Size: Free Size - Features: Velcro closure Please understand that this item has been stored at a private residence. Thank you for looking.