This versatile wrap is loaded with magnetic power. It can be worn at the waist, front or back or moved all the way up to the chest for middle back application. Adjusts with velcro closure to fit up to 40". The Magnetic Back Support Brace is the great choice for sciatica, lower back pain relief and herniated disc pain relief. It offers excellent support and helps to speed the natural healing process for lower back pain relief, sciatica, arthritis and herniated disc pain relief. Twenty (20) powerful grade magnets each of 1, 200 gauss, inserted at precise locations, effectively penetrate over 4" to provide total coverage and saturation of the lumbar region. The patented thermal regulation removes perspiration and excess heat so the support can be worn comfortably under a wide range of conditions.