Originally Posted by FLRider
They are thin, yes. And they're relatively heavy compared to cottage industry gear. However, for the price, it's hard to beat them on comfort-to-weight.
A poncho liner is usually good for most folks down to 45-50* (I can usually push one down to freezing, but I'm also a nearly inhumanly warm sleeper). A no-sew PLUQ is usually good down to about 40-45* for most folks. If you add insulation to a PLUQ, it can go as low as the twenties (I've been warm down to 25*
comfortably with the supplement of a single layer of InsulBright, and I've survived at 21*--I was cold that night).
They're cheap and readily available. That makes 'em great for someone just finding out if they're interested in this whole "camping" thing.
Hope it helps!
I can confirm what FLRider is saying. I had mine down to 13 degrees f at the Middle Tennessee hang a few weeks ago with no problems. Reflectix pad in between the PLUQ layers and a thermarest pad in my double layer BIAS WWM. I stayed comfortable all night long in just a thermal top, thermal bottoms, smartwool socks, and a fleece hat.