Come and see our amazing products. This balance yoga ball is double-sided, top rugged surface could be used for foot massage, bottom side is used for balance training. The anti-slip circles at the bottom of this PVC yoga ball ensures your practicing safety. And there is a gas nozzle at bottom, you can inflate by yourself. The rolling foot wakers help to stimulate blood circulation, relax nerve endings to relieve your tension, strengthen body agility, improve overall balance. Pls confirm with us about the packing info, stock color and exact production time before placing your order.