I FRMMY Newest Non Slip Area Gripper Rug Felt Pad, Ultra Strong Anti-Slip, Thin Profile 0.06in Thick, Keep Your Rugs in Place (2 x 4 ft)- Gray

I had a carpet that always slipped underneath your feet when you walked across it quickly, which is a safety hazard. I threw down one of these non-slip maps, and I can literally take a running start and jump onto the carpet and it doesn't move.I also checked after a week underneath the pad and the hardwood floor, and no marks left.

I needed to replace our old pad as it had lost it's stickum. The size of this gives me options for the rugs in front of our patio door. We have a long haired cat who drags in all kinds of vegetable matter & are in & out mulitple times during 3 seasons of the year. Winter not so much! This stays in place & I can fold it out for larger rugs. I found it a bit pricey but hey what isn't these days? I do recommend.

I cannot definitely speak to how it would work under carpets since I did not use it for that, but I suspect it would work well enough for that. I put a sheet of this non-stick felt pad in between two (stacked) small, but stable, wooden bookcases. This product works great. It was easy to cut and thin enough so that it is not visible. (Being dark gray also helps with that.) The product came quickly.

Thinner than I tough but does his job

As advertised and works great under my carpet. Thin enough to lift the carpet but hold in place. Adds a teeny amount of cushion as well.