Mummy bags are very effective for keeping warm, but I am not comfortable in a confining bag. We bought two Ozark Trail 30-Degree Sleeping Bags. We have stayed nicely warm while sleeping in the cold in this bag. Rated for 30-degrees, we have slept in it down to 13. I could have gotten better quality… Continue reading Ozark Trail 40-60F Sleeping Bag WM-30BLUWFS Rollaway Beds Shipped Within 24 Hours