At first glance this bag is super light and meets my needs for warmth. I sleep on the hotter side so this bag keeps me comfortable even in the upper 20's anything lower and all I would need is an extra layer and I'm fine. The fact that this bag is made in America made this bag a must buy for me. It compresses down to a little bit wider and about 2 inches taller than a nalgene bottle which saves a TON of space in my pack which allows for more food and other assorted necessities. I would recommend this or the summerlite to anyone looking for a high quality sleeping bag.