We built the Universal One Bag following the principles of universal design, creating a sleeping bag that's easy to use and built for everyone. Instead of a zipper, the bag has a simple magnetic FIDLOCK(R) closure. There are tactile silicone highlights that make components easier to find, and we've added two folding wings that allow for three different levels of warmth that you can customize depending on conditions. Details & Design: Temp Rating: 20degF / -7degC Strategically placed tactile lining panels and silicone prints help make the bag's components easy to find by touch Hassle-free fixed footbox Included stuffsack is designed to be used with one hand Technology: Closure uses a magnetic FIDLOCK(R) fastener instead of a zipper, which makes it easier to get in and out of the bag The folding-wing closure offers three warmth options: Use the lighter wing alone for a bit of warmth, the heavier wing alone for more warmth or them both together for the highest level of warmth on colder nights When sleepers use both wings, they can choose which one they want directly on them: the heavier wing with its warmer next-to-skin material or the lighter wing with its cooler-to-the touch material " Details & Design: Temp Rating: 20degF / -7degC Strategically placed tactile lining panels and silicone prints help make the bag's components easy to find by touch Hassle-free fixed footbox Included stuffsack is designed to be used with one hand "