Pump and tape measure included ideal for building core strength robust pvc construction corresponding core balance fitness equipment available build superior core strength and balance with the highly versatile core balance anti burst gym ball. By creating an unstable surface, the ball constantly engages your stabiliser muscles, putting your core into overdrive for an incredibly effective workout. Constructed from durable anti burst pvc material, it is designed to slowly deflate rather than pop if punctured, ensuring superior safety. Anti slip lines around the perimeter provide a superior grip, giving you greater confidence for performing a wide range of exercises, from crunches to yoga postures. The set includes a pump and tape measure for easy inflation. The ball can even be used as an office chair to engage your core while you sit.