I bought this bag a year ago and have used it from…
Fill: Dupont Thermolite
Temperature Rating: 32 F
Weight: 1 lb 8 oz
Price Paid: $30
I bought this bag a year ago and have used it from 30 degrees and windy to 65 degrees and sultry. All of my trips have been in the Ozarks of northern Arkansas or the Ouachita Mountains of central Arkansas. It's the only bag that I own, mainly because I'm a cheapskate.
In the warm weather, I usually just take a cotton sheet and sleep on top of the bag. In the cold weather, I'll put on a layer or two as necessary. I tend to wake up sweating. I don't know that I can blame that on the bag, since I've never used another one.
Two pluses: the weight and the stuffsack. It stuffs down plenty small enough to fit in the sleeping bag compartment in my pack with room to also put other stuff, like the cotton sheet for warm weather, my North Face rain jacket, and a sack of extra compression straps. It has a shoulder drawstring, a drawstring in the hood, and a draft tube that runs the length of the zipper. The size is 32" X 86".
My guess is a cold sleeper and about 45 degrees would be an O.K. combination. For only $30, it's worth a try.
Update: May 22, 2009
Update of my previous review. I used the bag back in January 2009 in Big Bend NP. It was pretty cool, with temps every morning we were there in the 20's.
Here's what you probably already figured out, and what I now know for sure: you get what you pay for.
I was basically cold every night. The first morning I woke up to 20 degrees. I was cold! I couldn't put on enough to stay warm. I've since used the bag in the upper 40's wearing an Under Armour Cold Gear base layer, and I was still on the cool side. So this will now be my summer bag ONLY!
I suppose the loft is shot. I store it hanging in my closet, and it gets shaken out regularly, but like I said before, you get what you pay for. I'm now in the market for a real 15 - 20 degree bag.