Big Agnes Lost Ranger UL 3N1 Sleeping Bag: 0F Down

Four-season performance in one sleeping bag? It's unheard of, so Big Agnes created a clever solution: a three-in-one design. The Lost Ranger UL 3N1 Sleeping Bag is two ultralight sleeping bags that are still comfortably light together while we're backpacking in winter conditions. The rectangular outer bag is great for warm summer nights, and the inner Sidewinder mummy bag is ideal in the shoulder seasons. Together, they deliver zero-degree warmth so we can explore all year round.