I bought this one for under my rug and it’s working very well

https://www.amazon.com/dp/B0149KH2ZW?ref=ppx_pop_mob_ap_share

Be careful rugs and rug pads can ruin floors by leaving in non-removable stains. I have LVP floors, so I had to be careful.

Anyhoo, I’m happy with my rug pad. It makes my inexpensive area rug feel a little more luxurious. Even the dog has started laying on the floor instead of couch, so that tells you something!