Unless it was a shipping mistake this is not a double sleeping bag, but a very generous single. I had to return it as I wanted a sleeping bag for two normal sized people and this would no way fit 2 people, only 1. I've informed Amazon that it shouldn't be advertised as a double as it's misleading. However, if it was twice the size I would have been very happy. The material is cotton and breathable and weight would have been good for a spring/summer trip. Not sure it would be good for Autumn or Winter.