Improve your balance and tone up with the Celsius 55cm Fit Ball. This versatile exercise ball can broaden your exercise horizons, allowing you to do new stretches and exercises to improve core strength as well as focus on specific muscle groups. With anti-burst technology, the Celsius Fit Ball is highly durable and designed for long-lasting use. Available in a range of sizes to suit your height, simply pump and workout in the comfort of your home and office, it's that easy.