Properties: Spokey FIT SEAT sensory cushion: 2 in 1: designed for motor coordination training and massage, enforces a sitting style that relieves and trains the muscles and joints of the spine, It is used for balance exercises, motor coordination and foot massage, it has two types of surfaces: one side is smooth with small embossments and the other side is massaging and stimulating with long protrusions, comes with a handy pump. Technical data: diameter: 33 cm material: PVC weight: 900 g maximum user weight: 100 kg pump included