This bag really shines when you are stuck in the tent for a few days due to storms. It is roomy which works well for drying boot liners, keeping things from freezing and if it gets really cold you can wear a parka to bed. It is a little heavy and the neck baffle can be bothersome,however when it is really cold that baffle is amazing. It is very expensive but if you spend a lot of time in frigid conditions it is money well spent. I am going to Alaska soon to do some alpine climbs and this will be my ace in the hole.