Material: fabric， oxford clothFilling: SpongeSize: 12.40 * 12.40 * 2.87in Strap can adjust the size 15.74-33.07inWashing: Hand washUsage: There are two straps， you can adjust the length of the strap tied to a chair in which the seat plate， plug safety buckle， another bandage tied back， plug safety buckle， then adjust the length of the cushion to pull tight.For more than 24 months baby to use.