Features:Our wobble cushions feature raised contacts, which can increase friction and keep you away from slipping while exercising, but massage your muscles, offering you a pleasant using experience.The wobble seat for kids is functional, and you can vent the air when not in use, can easily put into your backpack, tote bag, gym bag or other places, will not bring much burden to you or take up too much space.Specifications:Material: PVCColor: MulticolourSize:Diameter: about 13.39 inches/ 34 cmInflatable height: about 3.15 inches/ 8 cmPackage includes:2 x Inflated wobble cushion1 x PumpNotes:Manual measurement, please allow slight errors on size.The color may exist a slight difference due to different screen displays .