All PROIRON exercise balls are made of high-quality PVC material with a thick 2mm wall that can withstand up to 300kg load. The anti-burst system mean PROIRON exercise balls will only slowly deflate instead of bursting if the exercise ball is pierced by a sharp object. The fitness ball has a non-slip surface, which is essential for a safe workout, the Eco-friendly material for gym ball will not irritate your skin. Each PROIRON gym ball comes with an easy-to-use hand pump. When the Swiss ball is not in use, you can release the gas, fold the ball and store it. This versatile exercise Ball is the perfect addition to your home gym, whether it\'s Pilates, yoga, cross-fit or abdominal training. It is also perfect as an OFFICE BALL CHAIR to improve your Core Strength & Relieve Back Pain. Also Suitable as pregnancy ball or therapy ball In addition to using these exercise balls for a workout, they are also suitable for use as a birthing ball, balance ball, or physio ball for rehabilitation. Whet