RUGPADUSA – Cloud Comfort Memory Foam – 6’x9′ – 7/16″ Thick -Luxurious Cushioned Rug Pad – Water Resistant

works well! shipped quickly, well packaged, and was not dirty upon arrival like some of the other reviews experienced. the size was as advertised and fits perfectly under my new rug. the pad lays flat, doesn’t slip around, and the rug on top does both of these as well. i got this to use in a room that sees a bunch of toddlers run, jump, and roll around on a weekly basis – it’s held up to their actions and also kept them well protected with the many bumps and falls involved. This is a great alternative to either the kids puzzlepiece foam playmats (like the house of noa ones) or the one piece memory foam playmats – you can stick a washable or easy clean carpet on top and you willstill have a “real” carpet with less of that playroom feel but still achieve max padding. it also allows for a bigger size than those one piece mats, and you also don’t have to deal with the downsides of the puzzle ones (no edges curling up, prices the kids take apart, etc).