Duraton 20 F Mummy Sleeping Bag

The rating technically shows consumers the minimum temperature for survival if they are in full thermals AND on a sleeping pad. Obviously, that doesn’t sound very comfortable so as a rule of thumb you should add 10-30 degrees to the rating for a minimum "Comfort Rating" temperature. Keep in mind that "comfort" is relative from one person to another, and you still need to wear full thermals (and maybe even a sleeping pad) at those temperatures. Example: A 20F sleeping bag is likely good for camping in areas with higher than freezing temperatures. Durable Materials:  210T Ripstop Nylon shell means your sleeping bag is strong. It is very hard to puncture, but if it does, the hole will not run or expand. 300 GSM Hollow Fiber Insulation means your sleeping bag has a dense fill (some bags are only 200 GSM) that will keep you warm even if it gets wet. Taped SBS Main Zipper means you can trust that your zipper will not fail or snag. Comfortable Design: Brushed Flannel lining makes you feel like you are at home in your own bed. The soft, comfortable flannel lining adds yet another layer to keep the warmth inside the bag. Multiple Draft tubes trap warm air inside the bag instead of escaping from areas near the main zipper or the face opening.