You'll stay comfy with lightweight Coletherm® hollow polyester insulation and the Thermolock? draft tube helping to keep your body heat in the bag. The Comfort Cuff? design makes sure you only have soft fabric around your face while you sleep. Thanks to the ZipPlow? zipper, you'll get snag-free opening and closing every time. A few small things, such as gloves or a flashlight, will fit inside the interior tuck pocket. Packing up is made easy with the Roll Control? system to keep your bag straight while rolling and the no-tie Quick Cord? system to keep things cinched tight, and an included stuff sack provides extra storage protection.