I was replacing an old belkin waverest mouse pad with this one. Its been a few years so it was time. They must make them differently now. The wrist rest was extremely uncomfortable and gave me pain in my arm. I had to switch back to my old one. This is just sitting on my desk gathering dust now. I'll be buying a different one in the oval shape with hopefully a better wrist rest on it like my old ones have always had. Not sure what rock material this is made of now. It sucks.