Coleman Cloudcroft X 20L Mummy

I initially bought this bag for $200 and loved it. It is less than 3 lbs and compresses down to nothing. 

A month later I found that Coleman had dropped the price to $90. I brought the bag back to Dicks and they honored the new price and gave me the difference. I have used it for around 40 miles on the Appalachian Trail with no issues.

http://www.coleman.com/coleman/colemancom/detail.asp?product_id=8475-510&categoryid=9090&brand=