Outdoor Vitals is no stranger to high quality sleeping bags. The Summit 0\u00b0F in particular is one of the best sleeping bags for its warmth, snug and comfortable mummy bag design, and it\u2019s ultralight backpacking nature. This is the kind of sleeping bag you need for camping in cold weather, considering its performance.\r\n\r\nWhy We Like It - Outdoors Vital Review\r\nOutdoor Vitals\u2019 Summit 0\u00b0F Sleeping Bag provides the perfect option for year round camping thanks to its ability to withstand low temperature ratings, while keeping you warm and comfortable. And for lighting up your camping experience, read our review of how Joby lights it up again with GorillaTorch Switchback.\r\n\r\nPerformance\r\nOutdoor Vitals\u2019 Summit 0\u00b0F is tough against weather, being able to withstand temperature ratings as low as\u2014you guessed it\u20140\u00b0F or -17.78\u00b0C if you prefer Celsius. That\u2019s much lower than Western Mountaineering\u2019s Summerlite Mummy 32F.\r\n\r\nWhat makes the Outdoor Vitals Summit 0\u00b0F so light is its 800+ fill power down. A smart move was made by moving a bit of the down around the back and adding it to the bottom, where your feet would be, for warmer feet. When you\u2019re cold, warm feet are necessary for sleep. And with it being water-resistant, you\u2019ll stay warm and cozy when condensation comes knocking.\r\n\r\nWith that said, packing the sleeping bag is rarely a problem. You\u2019ll have to be precise or else you end up fighting the compression bag.\r\nDesign\r\nThe Outdoor Vitals Summit 0\u00b0F is compact in design. As for the shape, it adopts the same shape as the ancient pharaohs of Egypt\u2014the so-called \u201cmummy\u201d sleeping bag. This shape allows for heat to stay trapped for a long period of time.\r\n\r\nHowever, unlike Winner Outfitters Mummy Sleeping Bag or the Teton Sports Leef 0, the Summit adds just a bit more space, enough to give you some room. The length varies with the shortest size limited to individuals no taller than 5\u20196\u201d, and the longest limited to individuals no taller than 6\u20196\u201d.\r\nValue\r\nThere\u2019s a lot of value in the Outdoor Vitals Summit 0\u00b0F. Given its performance and comfort\u2014especially being usable all year round\u2014it\u2019s fairly priced around $250. However, you may want to consider investing in a sleeping pad when it reaches 0 degrees Fahrenheit. Its sizes lend itself to being accessible to larger bodies. And it goes without saying: a lifetime warranty is absolutely superb. You\u2019ll need it for the amount of use you get out of it.\r\nOutdoors Vital Review Wrap Up\r\nVenturing into temperatures at 0 degrees Fahrenheit, you won\u2019t find a better companion than the Outdoor Vitals Summit 0\u00b0F. Its high quality performance makes it a dream to slip into for the night. Dealing with the compression bag is one thing, but if you\u2019re claustrophobic, you\u2019ll want to steer away from this sleeping bag; otherwise the Summit 0\u00b0F is positively excellent for any season. Having a lifetime warranty and various sizes is icing on the cake.