These Roll Model massage balls are a safe and easy way for you to perform self-myofascial release (self-massage) techniques from the comfort of your home or office. By using the ALPHA Ball TWIN set for targeted self-massage, you can access areas that hold pain and begin your journey toward lasting relief. The ball itself features a soft top layer and a dense inner core that allows you to work over and around bony areas. Regular and consistent work with these Roll Model massage balls will not only offer you pain relief but will also help to fortify your body against it. Ailments that can be treated with an ALPHA Ball TWIN set include migraine headaches, stiff neck and tight jaw, sciatica and back pain, tight hips and hamstrings, IT Band Syndrome, and more. For optimal results, utilize these massage therapy balls in conjunction with The Roll Model® Method by Jill Miller, an effective, soft-tissue conditioning fitness format.