A good night's sleep is key to having a good time while out on a trip. A good sleeping bag (and a good sleeping mat) is key to getting a good night's sleep. There are lots of places to get lots of types of sleeping bags. We prefer three weights of down sleeping bags. Why down? You can't beat it in terms of warmth and packability. Exped down bags are expedition grade, pack small, are durable, and best of all perform in all temperatures, from cool autumn nights to February mornings at -35°C.