I'm 60 years old and have been camping my whole life. These are nice bags. The cotton lining is a big plus over the slippery nylon of others I've used. Another nice feature is the zipper system using separate bottom and side zippers. Open the bottom and stick your feet out if you get too warm. Speaking of warm, these bags are. Used them on a recent motorcycle trip and they were actually too warm for the evening. Remember these are 4 pound bags and are larger for packing. They have other nice features too, including a velcro tab and drawstring at the neck. The ONLY complaint I have is the lack of ties or straps to keep them rolled for stuffing in the sack provided and that's pretty easily fixed. Great Sleeping Bags!!