I bought this bag in a big hurry AND because my son bought me one of the Big Agnes sleeping mat that fits into the bag for my birthday. I should have bought the down bag (in my haste to buy I thought that I did). We camped in the Boundry Waters and it was around 30 degrees at night and I was very cold! I thought that maybe is had been packed for so long that it needed to be left out for a while, so I did in hopes to to get the stuffing to expand. When I returned home I put it into the dryer with some tennis balls and have yet to try it again. I will say that it is made incredibly well and the bag/mat combination is just great, no more turning and falling off the sleeping mat because it fits inside the bag. I really want to like this bag, but again I probably should have bought a Big Agnes down one!