They grip great, provide a little bit of cushioning and they are 100% rubber!

This rubber pad cost nearly as much as the inexpensive kilim rug I have put by an outside door, but I think is going to work out perfectly with dogs and people coming in and out with snowy boots. I have a similar rubber pad under another rug in my house that has held up very well for several years, so I searched high and low on the internet to find one just like it. This pad came in 2 sections for an 8x5 rug (as was stated on the web site). There were no suggestions on how to put the 2 pieces together. I used duct tape on the rug side of the pad. Hopefully that will hold up too.