The Gymnic Disc ‘o’ Sit 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 your body to constantly try to find a balanced pelvic position by engaging your core. By actively engaging your core you are burning calories while sitting and by elongating your spine with proper posture you can reduce the pressure on your lower back, relieving stress and pain. Good posture promotes improved memory, focus and productivity. The Gymnic Disc ‘o’ Sit 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. Use the Gymnic Disc ‘o’ Sit Inflatable Seat Cushion at home, the office, or at the gym to perform a wide range of exercises. This piece of equipment easily integrates into your daily routine; simply adjust the inflation intensity in order to customize the stability level you need. Push your workout to new heights by engaging more muscles groups at a time. By incorporating balance-centric exercises into your workout, it enables your muscles to work harder to stabilize your body. This helps intensify your workout which in turn, burns more calories. Made from durable, latex-free, vinyl which supports a maximum weight of 270 lbs. and is also phthalate and BPA free. Packaged with a bonus fitness guide to enhance your personal workouts and help you get the most out of your Gymnic Disc ‘o’ Sit inflatable Seat Cushion; measuring 39 cm.