Marshal Fitness Inflatable Balance Yoga Ball Mf-9172A

Wobble cushion provides a fun way for children or students to maintain sitting on the chair.

You need to maintain balance when sitting on the cushion which makes you strengthen the core muscle accordingly.

It is pre-inflated. It comes with a pump so that you can adjust the inflated level as what you want.

Diameter is 13 inch and weight is 1000 gr. The load capacity is up to 1, 000 lbs to ensure your safety.