My husband has arthritis in his back and hips and we tried almost everything we could find to treat it. The heat pads don’t work so well, they don’t get deep enough to stimulate the muscles. We bought BioMat before but we had to return it as the cover tore after few weeks and my husband burnt his skin. InfraMat is wonderful and well made you pay for the quality fabric and the stones heat up well and penetrate deep to relieve tension in the muscles and joints. We ordered a smaller mat for my shoulders too.