The Big Agnes Torchlight collection features unique, expandable sleeping bags, and the Women’s Torchlight 20 Sleeping Bag is the best option for trying to stay warm in colder climates. The zippers on each side can expand by 5 inches, giving you a combined extra space of 10 inches, which is a lot in a mummy bag. Slide the zippers around to create a fit customized to your sleeping style and wiggle preferences. Extra room is handy for side sleepers or when you find yourself wearing extra layers and the fully zipped up setting helps you warm up more quickly. The bag’s insulation has been treated with DownTek to retain lofty warmth in wetter climates. The shell is water-resistant for when you need a little extra protection from the weather, like when you forget to put the rain fly on your tent and it starts raining in the middle of the night.