Black Mountain Products 2000lbs Static Strength Exercise Stability Ball with Pump, 65cm Green

I use this balance ball as an office chair... I realised I can't go all day on just one type of chair... I need to switch to something alse after a few hours, otherwise my legs would start getting uncomfortable... so, I start the work day with the balance ball, and after a few hours, when I feel I'm getting tired of that position, I transition to the chair... The pump is pretty flimsy, but I think of the pump as more of a bonus and don't consider it in the overall quality and value of the item. The ball itself is made of a nice thick material and it holds air well... I decided to go with the 85cm size (the biggest there is) because I can make it short or tallest, by just regulating the air in it...

We're using this in place of our office chair for better posture, and it's exactly what we were looking for. Great product and easy to inflate with the included pump.