Striking a superb balance between warmth, weight, and durability, the Marmot COL EQ -20 Degree Sleeping Bag is the go-to bag for ascents and expeditions when you know the mercury is headed below 0°F.

Voted Best All-Weather Bag- Backpacker Magazine's Gear of the Year Awards 2009Ideally suited for moderate winter activities, the Banshee features Mountain Hardwears exclusive moisture shedding, Conduit SL shell and welded-baffle construction to resist inclement weather and hold incidental moisture at bay. This compact, light four-season alpine bag with a regular mummy cut is insulated with 800-fill down to keep you warm and comfortable.

Voted Top Ultralight Winter Bag- Backpacker Magazine's Gear of the Year Awards 2009Beautifully sleek with the warmth of a summer afternoon breeze, the Lithium O Degree sleeping bag from Marmot will ease the mind on cool Spring, Fall or Winter trips. The ultimate year round bag.

A favorite among the Mountain Hardwear alpine climbing team, the Phantom™ 0 is Hardwear's lightest four-season bag. This snug mummy cut bag is insulated with 800-fill down, built from Superlight 15 denier fabric and tuck-stitched for durability. Extra insulation in the torso and footbox accommodates a woman's thermal needs in colder conditions.

A favorite among the Mountain Hardwear alpine climbing team, the Phantom 0 is our lightest four-season bag. This snug mummy cut bag is insulated with 800-fill down, built from Superlight 15 denier fabric and tuck-stitched for durability. The Phantom 0 uses every trick in the book to keep you warm while being as light as possible.

In demanding conditions waterproof/breathable fabric preserves the integrity of down. With a MemBrain® shell and the highest quality down available, the Helium EQ is a versatile ultra-light bag for mountaineering and backpacking.

With heaps of high-quality down and an expedition-friendly design, the Marmot Couloir 0 Degree Sleeping Bag delivers guaranteed cold-weather performance for four-season camping and treks among the high peaks of the world.

Slide on in for the warmest night under the stars (and snow and wind and then some). Eight-hundred-series premium goose down gives the Echo its Arctic-ready warmth and Drizone waterproof-breathable shell fabric protects you from the elements. After a few days in the mountains your expedition mates will appreciate the Echo's Funk!Off liner-simply turn the bag inside-out, leave it to sit in the sun and voila, dirt and oils magically break down for a cleaner, fresher bag. Warm and never funky, the perfect winter-time companion.

With light-weight construction and male-specific fit, the GoLite Adrenaline 0 Degree Sleeping Bag for men provides premium comfort in 800-fill goose down. Windproof, water repellent, downproof and breathable Pertex®: microfine filament yarn is tightly woven into a tiny ripstop pattern to give exceptional moisture protection/management at the head and foot of the sleeping bag.

Built with premium 800-fill goose down, the GoLite Venture 0° Sleeping Bag for Men offers superior warmth, unmatched comfort, and a lite-weight, compressible construction that delivers a male-specific fit in a 4-season bag. The waterproof Pertex® Endurance Arid Zones™ at the head and foot of the bag protect against condensation, so your down bag will keep you warm even in wetter climates. The wider mummy shape of the venture provides more wiggle room and the full-length side zippers allow for bags to zip together for your snuggling enjoyment.

Designed with the highest quality 800+ Eastern European goose down, The North Face Nebula 15 degree mummy sleeping bag for women is designed to ensure maximum warmth and comfort in temperatures dipping down to 15ºF. Made to withstand three-season exploration, this bag's durable, waterproof, HyVent™ shell endures mild exposure to snow and water.

The Spark helps you sleep well, even when the mercury falls to 15 degrees. With Partial Flex construction you'll sleep more comfortably and more warmly than ever before. All without adding noticeable weight! We generously fill the continuous baffle construction with 800-fill down, distributing more through the torso to bolster warmth. The down-filled draft tube and Jacket Hood take a miserly approach to your body's warmth-they horde it greedily! Twenty-denier shell material won't sprout down, resists tears, and saves on weight, too. The Spark stuffs to a tiny seven-by-17-inch package.