Review on 50cm Diameter SPRI Balance Trainer Sport - Dome Shape Half-Exercise Ball with Non-Skid Base for Effective Balance Training, Strength Building, Toning, and Enhanced Flexibility by Marc Gallner

Comes with a small pump and 4 plugs. I'm in my fifties and maintaining my core and the muscles around my joints that help with balance is part of my fitness routine. The dome is very well made. Simply using it for squats is a lesson in humility and makes the time even more productive. Very happy to add this to my routine. It's comfortable to sit on and makes crunches harder but easier on my back. The base is very stable and I feel very secure on the canopy.