I have found these great to use when I don't have my boyfriend around to give me a massage. (sometimes these balls actually do a better job then he would, but don't tell him that) I have a lot of pain in my back from my posture and my boobs, so this helps to relieve some of it. I also have been using it on my feet after I go out for walks and exercising with my boyfriend. These are able to be found on Amazon . I received these at a discounted rate in exchange for a honest review.