I just checked. It's the Therm-a-Rest ProLite 3 S (small).
Ah ok, that's 1.0" inches thick.
The ProLite 4 which I have is 1.5"
Sorry I thought only the 4 was orange my mistake.
And I believe the one my friend has is 1.25".
You having a small probably means your not to big of a guy so 1.0" you would think would be enough to be comfortable but if it's not (after blowing it up) maybe it's time to upgrade <img src="/images/graemlins/smile.gif" alt="" />
The basecamp is 1.75" but is a lot larger to pack. The ProLites sure package small and tiny <img src="/images/graemlins/smile.gif" alt="" /> They fit in my pack even.