Description:long term use can make your body more perfect curves effectively!long-term exercise can promote brain balance and softness of the limbs!suitable for sisters with fat belly， thick arms and legs!increase blood circulation， strengthen heart and lung function!can keep your spine straight， thus improving your hump-back issue!Combination of leisure， exercise， weight loss and self-cultivation， safe and convenient to use!Color: blue/Gray/Red/Green/Purple(random delivery，we don't offer color choice，thank you for you understand!)Material: PVCProduct specifications: inflated diameter 45cmOverall size: (inflated) about 90x45cmLoad-bearing: Max 200kgPackage included:1 x Yoga ball