Gaiam Ultimate Balance Ball Chair (Standard or Swivel Base Option) - Premium Exercise Stability Yoga Ball Ergonomic Chair for Home and Office Desk - 52cm Anti-Burst Ball, Air Pump, Exercise Guide

Absolutely stellar product. Such a well designed chair. I'm a 28 year old, 6ft 1in, 225lb man & this thing is insanely comfortable. The back rest is so well placed & offers just enough support to rest your core periodically, the ball is stable & comfortable, the base of the chair was easy to assemble (took all of 10 minutes), & this is truly an almost perfect product in every way. If you have trouble sitting still, if you want to be more engaged while working, if you don't want to cut off the blood circulation to your legs for 8 hours a day, then just buy this thing already haha. I did see others mention that the roller wheels don't do super well on carpet, and that is true. My office floor is carpet tile on concrete & even then, the wheels aren't phenomenal. Specifically when I'm sitting on the chair trying to roll, I can make it happen, but it's not necessarily easy. But, don't let that deter you from purchasing this otherwise wonderful product. Can't believe how nice this is for the amount I paid.

Venía de usar una silla sin respaldo por años, muy feliz mi espalda, no muy felices mis rodillas. Había intentado la bola por sí sola y la altura no era la correcta. Esta silla es justo lo que promete y mi espalda y rodillas lo agradecen.

The product is wonderful, allows to move while remaining at the right place. I use it both at home and at work. Less hips and leg pain when getting up after an hour or more sitting down.

This was to replace a slightly different model I'd had for 5 years and it hasn't disappointed. It was very easy to put together and is perfect for my home office. It is slightly higher than I expected. I'm 5ft 5 and use a foot rest with it to make it more comfortable. Would highly recommend

Love this. Easy to assemble and great for posture and movement