Description The filling is made of a blend of two types of cotton with different fiber thicknesses to create a soft and glutinous elasticity.For the side fabric, polyester is blended with elastic polyurethane to create a soft, stretchy fabric that can be stretched without losing the softness of the inside. The center of the mattress is hollowed out so that it conforms to the body well, and the height of the left and right sides is higher than that of the center. Horizontal: When used horizontally, the gusset height is calculated so that when you lean on it, the pressure of your body will cause it to sink in, and the crushed part will protrude, allowing your arms to rest comfortably on it.Vertical: The height has been adjusted so that when used as a backrest, the seat is aligned with the body from the waist to the back. [Size]55cm×40cm×20cmPaymentWe usually ship within 5〜10 business days of receiving cleared payment.ShippingWe ship using FedEx, DHL and Japan Post.International Buyers - Please Note:Import duties, taxes and charges are not included in the item price or shipping charges.These charges are the buyer’s responsibility.Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying. These charges are normally collected by the delivering freight (shipping) company or when you pick the item up do not confuse them for additional shipping charges. I do not mark merchandise values below value or mark items as "gifts" - US and International government regulations prohibit such behavior.