What do I need to put under my carpet?

[IT Minion]

Another vote for the cloud 9 cumulus (11mm).

I looked at going for Tredaire red once but decided against because for living room/bedroom use it seemed to be less likely to be as comfortable. It might have a place for high traffic areas, but I wouldn't bet on it.

 

[ort67]

We ordered this stuff from the carpet place, looks like it will do the job:

https://www.screwfix.com/p/tredaire-softwalk-polyurethane-foam-carpet-underlay-9mm-15m/36534