The gymnic disc ‘o’ sit Jr. Inflatable seat cushion is a dynamic seat cushion which triggers the trunk muscles of the body and supports the spinal column. Carefully designed in order to promote better posture; allowing the body to constantly try to find a balanced pelvic position by engaging the core. By actively engaging your core and elongating the spine with proper posture you can reduce the pressure on the lower back, relieving stress and pain. Good posture promotes improved memory, focus and productivity. The gymnic disc ‘o’ sit Jr. Inflatable seat cushion is also widely used by trainers and therapists to offer ground exercises in order to develop coordination and to improve reflexes and stability. Perfectly suitable for the small chairs of the nursery and primary school; recommended for ages 3 and up. Simply adjust the inflation intensity in order to customize the stability level you need. Made from durable, latex-free, vinyl and is also phthalate and BPA free. The gymnic disc ‘o’ sit Jr. Inflatable seat cushion supports a maximum weight of 100 lbs. Product compliant for class I medical devices; measures 32 cm.