Refuel on your next below-freezing backpacking adventure in the ultra-light, eco-friendly Lithium Long -19° Sleeping Bag, featuring a new sustainable ExpeDry water-repellant technology that increases performance and reduces the drying time of your down bag. With an optimal ISO-tested comfort that performs well below zero, the Lithium packs serious warmth in a super-packable 800-fill down bag designed to easily stuff into any overnight pack. A thru-hiking favorite, the new gas bags provide lightweight warmth that's light on the Earth--perfect when you're looking to maximize kilometers or speed in the mountains and minimize weight and space in your pack. If going tent-less is in the plan, you can count on the quick drying ExpeDry to perform as a bivy sack on cold, wet, or snowy ground or ledges.