Back Wrap (Small/Medium)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>16 powerful sewn in magnets placed to contact the back from hip to hip(1100 gauss - N)</li><li>Comfortable， durable with hook and loop closure to let you adjust to your size and comfort.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51UwM691l9L.jpg" noproxy>