Great exercise and stretching ball. I use these to stretch my arms before workouts, and also to use core workouts. The only thing I don't like is, it's a little tough to inflate the ball. I have owned others in the past, and this ball did not come with a small tool to remove the plug. The 65" is also larger than you'd expect, I would've preferred the 55" but didn't like the color, I wish I could specify grey color on all sizes.
Laguna Beach, CA