About this item [High Quality] Using high quality speical formula supportive foam,HOFISH ball pits is durable and not easily deformed,making it a great item for your beloved one. The smooth surface and non-slip bottom provide a safe and comfortable recreation ground for your little kid. 【Recreation Ground】With sturdy thick wall & Soft bottom, the ball pool provides the baby and toddler a recreation ground to play inside.There's no need to worry about getting bumped [Product Size] 35.4 inch x 11.8 inch x 1.96 inch (Outer Diameter x Height x Wall Thickness). Ball pits will hold up to 500 bals.Balls are NOT included. [Bottom Foam Installation]: FYI:The bottom foam does not come with cover,it is desinged to be inserted into the bottom of the ball pit cover ●When you received the ball pit,please turn upside down the ball pit and there is a zipper on the bottom of the cover ●Unzip the cover,fold the bottom fom into half and insert it in the bottom of the ball pit cover. ●Adjust the foam so that the whole section goes into the cover,then zip the cover ● Flip ball pit over,adjust the ball pit if necessary. [Bottom Foam Installation]: FYI:The bottom foam does not come with cover,it is desinged to be inserted into the bottom of the ball pit cover ●When you received the ball pit,please turn upside down the ball pit and there is a zipper on the bottom of the cover ●Unzip the cover,fold the bottom fom into half and insert it in the bottom of the ball pit cover. ●Adjust the foam so that the whole section goes into the cover,then zip the cover ● Flip ball pit over,adjust the ball pit if necessary.