We bought the grip rug-pad to go under the rug that we bought also here @ Overstock. I chose it because I didn't want a petroleum-based rug gripper to ruin my newly-refurbished hardwood floors (as many of them react harmfully with floor lacquer). It works great and when we unrolled it from its packaging, there wasn't that crazy chemical smell that lasts for days. Thanks, Overstock! Another great high-quality product.