Big Agnes Lost Ranger 3N1 : 0F Down

Imagine a single sleeping bag that's light enough for a backpacking trip, warm enough for sub-freezing temperatures, and simultaneously cool enough for summer stargazing. The Lost Ranger 3N1 Sleeping Bag might not be exactly that, but it does borrow tech from versatile three-in-one jackets to create comfort no matter the season. A light and lofty rectangular bag is fit for warm summer nights, the inner mummy-style Sidewinder bag delivers comfort for the shoulder seasons, and together, the two create insulation rated for zero-degree sleeps.