The instructions are to roll it over the targeted area to relieve tightness in muscles and sore tissues, encourage blood and oxygen flow. It's a handy size that you could take it with you on vacation, to a sports activity, or to work.
I used it on my feet just to relieve the tight muscles so that I don't get a foot cramp in the middle of the night or after wearing high heels for a long time but you can use it on most parts of your body.
I received this product for free. A favorable review was not guaranteed.
Check it out on Amazon