Great seats for frequent seater!

I work long hours at the computer and change often from the ergonomic swivel chair to stool to stay back moderately in motion. So far I had only the "TOPSTAR SI69 G21 Stool Sitness 20 red" to change, now as a second seat alternative to Sitness 5. Since then, my favorite seat! It animated to move and gymnastics at work.

And is securely and firmly on his legs, what a much better feeling than are the stability ball alone, I have banished from his desk a long time ago to prevent slipping.