You might try
thisor
this..
I have the 1/8" & 1/4".
The 1/8" is difficult for me to use. It's toooo narrow for me and so light that it's like trying to keep tissue paper in place and fragile enough that you have to baby it. It floats instead of lays. It isn't advertised as cushioning or padding, it's strictly for a little insulation. BUT, it is UltraLight and a tough guy could use it during moderate weather.
The 1/4" pad is nice & wide and can be cut down to the width you need. The 1/4" evazote is durable enough, but I don't think it's as durable as the
RidgeRest , which I used to own. The R factor for the evazote pad is less than the RidgeRest. If I used multiple pads to bring the R factor up am I really ahead?
I've been keeping the 1/8" at work, using it as a pad to do situps & a couple of other exercises during my breaks, and it has been cut, mutilated & marred beyond what I think a RidgeRest would have been in the same use. I have a book locker at work and the 1/8" rolls up small enough that it fits in nicely with my other stuff.