Velcro fasten,no need to worry about loosing.A very good product for improving blood circulation of neck and back,relieving the aching pain ,having the function of hot pack and supplementary physical therapy. 1.Put on the usb heating shawl anytime; 2.You feel cold in office insert the plug to usb port directely,no any other driver needed. 3.Far infared heating,relax the tension of shoulder and neck. TAG:heating shawl, heating shawl, heating shawl