User Review: The North Face Aleutian 3S Bx
Not a bag sleeping bag for the price. I bought this sleeping bag spring 2008 and used it the entire summer and fall. I have yet to take it down to its 20 degree rating, but the bag kept me warm and comfortable in 35 degree weather.
If you're looking for a good bag for under 80 dollars, I wouldn't have any problems recommending this one.