The Ultimate Back Saver!
This is a back saver! We have tried all kinds of massage tools, from foam rollers, to hi-push, etc.  By far, these Yoga Tune Up balls are the best.  If you can, look into getting the starter set with varying ball sizes to hit those hard-to-reach muscle groups in your back and shoulder areas.  Highly recommended!  We even bought 3 extra sets for our friends who also suffer from chronic back/hip/shoulder pain :)
Rating: 5 stars