I know and plan on testing this myself, to get a more accurate representation of what it offers. Just curious, if I had to attach a number to it, what that number might be. Its about 2 inches thick aired up.
Here is a link to the current version on amazon I just found.
https://www.amazon.com/Night-Cat-Backpacking-Ultra-Light-Comfortable/dp/B088WH9VFT

I see in the questions, someone asked the RValue and the reseller didnt know (as they are really just a reseller and that info isnt available from the manuf)