The manufacturer of the finish that's on my hardwood floors recommended ONLY all natural rubber rug pads. I had a very difficult time locating them, as all the local stores sell only those coated with PVC, which can discolor hard wood floors. I looked for months and then I found you online! I was very pleased when my rug pads arrived. The shipping was quick, the service was great and the quality of the rug pads was much better than I expected! Nice thick quality natural rubber pads. Thanks!