Alpine 0 Degree Sleeping Bag

Alpine 0 Degree Sleeping Bag is a roomy, lightweight down sleeping bag designed for cold-weather backpacking, hunting and remote camping. It combines an independently ISO-tested 0°F comfort rating with 850+ fill-power Dry Loft Down, body-mapped baffles and insulated draft protection to help retain warmth without unnecessary bulk.

Why Choose the Alpine 0 Degree Sleeping Bag?

A cold-weather sleeping bag should do more than carry a low temperature label. It should manage drafts, maintain down placement and provide enough room to sleep naturally. The Alpine 0 Degree Sleeping Bag is designed around those needs, with a 64-inch shoulder girth, shaped footbox and contoured hood that support warmth without creating an overly restrictive fit.

The Regular model weighs approximately 2 pounds 12.5 ounces, while the Long model weighs approximately 2 pounds 15.8 ounces. Both versions are made for backcountry users who need dependable insulation but still care about packed weight and available backpack space.

Key Alpine 0 Degree Sleeping Bag Features

850+ Dry Loft Down Insulation

The bag uses 850+ Argali Dry Loft Down. The down is responsibly sourced and RDS certified, with no wax-based waterproof coating. High-loft down traps warm air efficiently and allows the sleeping bag to compress for transportation.

The Regular size contains approximately 31 ounces of down fill, while the Long size contains approximately 34 ounces. This generous fill supports the bag’s cold-weather design and approximately seven-inch baffle loft.

ISO-Tested 0°F Comfort Rating

The Alpine 0 Degree Sleeping Bag is independently tested to ISO standards and rated around comfort rather than merely survival. A comfort-focused rating provides more useful guidance for selecting equipment intended for overnight recovery in cold conditions.

Actual warmth will also depend on the sleeping pad, shelter, clothing, humidity, wind, metabolism and overall sleep system. Always pair the bag with an appropriately insulated sleeping pad and prepare for temperatures below the expected forecast.

Body-Mapped Baffle Construction

A combination of vertical and horizontal baffles, differential-cut fabric and internal flow gates helps position insulation where it is most useful. This construction limits unwanted down migration and reduces the likelihood of thin, under-insulated areas developing during the night.

The baffle arrangement also helps the insulation retain its loft as the sleeper changes position, making the bag suitable for people who turn frequently while sleeping.

Roomy Fit for Broad Shoulders

With an internal girth of approximately 64 inches at the shoulders, 58 inches at the hips and 40 inches at the feet, the bag provides more room than many narrow mummy-style designs.

The additional space is useful for broad-shouldered users, side sleepers and people who dislike feeling tightly restricted. The Regular size fits users up to approximately 6 feet 1 inch tall, while the Long size fits users up to approximately 6 feet 7 inches tall.

Insulated Draft Protection

An overfilled neck collar and insulated draft tubes along the zipper and face opening help trap warm air inside the bag. The 3D contoured hood supports the head while reducing open spaces where warm air could escape.

Use the hood and neck collar together in colder conditions. Adjust them enough to limit drafts while maintaining a comfortable opening around the face.

3D Footbox for Better Loft

The shaped footbox follows the natural position of the feet. This design gives toes more usable room and helps prevent the feet from pressing the insulation flat against the end of the bag.

Maintaining loft around the feet is especially important in low temperatures because compressed down cannot trap as much insulating air.

Lightweight 15D Fabrics

The exterior uses breathable 15D Pertex Quantum fabric with a PFC-free durable water-repellent treatment. The interior uses soft 15D polyester for comfortable contact with clothing or skin.

The outer fabric helps resist light surface moisture, but the sleeping bag is not waterproof. Protect it from rain, shelter condensation and wet ground whenever possible.

Two-Way Anti-Snag Zipper

A two-way YKK #5 zipper provides convenient entry and ventilation options. An anti-snag cover helps keep the lightweight shell fabric away from the zipper path for smoother operation.

When opening or closing the bag, guide the zipper carefully instead of pulling forcefully. This protects both the zipper and the thin shell material.

Alpine 0 Degree Sleeping Bag Specifications

• Temperature rating: Independently ISO-tested 0°F comfort rating
• Fill power: 850+ Argali Dry Loft Down
• Down fill weight: 31.0 oz Regular; 34.0 oz Long
• Total weight: 2 lb 12.5 oz Regular; 2 lb 15.8 oz Long
• Internal girth: 64 in shoulder; 58 in hip; 40 in foot
• Exterior fabric: 15D Pertex Quantum with PFC-free DWR
• Interior fabric: Soft 15D polyester
• Baffle loft: Approximately 7 in
• Stuff sack size: Approximately 8.5 × 19.5 in
• Regular fit: Users up to approximately 6 ft 1 in
• Long fit: Users up to approximately 6 ft 7 in

What Is Included?

Each package includes the Alpine 0 Degree Sleeping Bag, a compression stuff sack for transportation and a cotton storage sack for uncompressed storage at home.

The compression sack is intended for travel rather than long-term storage. After each trip, remove the sleeping bag, make sure it is completely dry and store it loosely so the down can remain lofted.

Integrated Pillow and Phone Storage

Connection points inside the hood work with the Elite Dream Backpacking Pillow, helping the pillow remain in place as you move during the night.

An internal pocket near the shoulder provides a protected place for a phone or another small item. Keeping a phone closer to body warmth may also help limit cold-related battery loss.

Complete Your Backcountry Sleep System

Pair the bag with the Elite Dream Backpacking Pillow for adjustable head support that connects inside the hood.

For milder temperatures, compare it with the Alpine 20 Degree Sleeping Bag, which provides a warmer-weather alternative within the same sleep system.

Browse the complete Sleeping Bags collection to compare available sleeping bags, pillows and related backcountry sleep accessories from Calenvia.

Care and Long-Term Storage

Never store the Alpine 0 Degree Sleeping Bag permanently inside its compression sack. Hang it in a dry closet, lay it flat in a protected space or use the included cotton storage sack without placing heavy objects on top.

Spot-clean small areas with mild soap and water. Wash the complete bag only when necessary, using a cleaner made specifically for down products and a front-loading washing machine.

Avoid regular laundry detergent, bleach, fabric softener, dry cleaning and washing machines with a center agitator. These methods can damage the fabric or reduce the natural loft of the down.

Dry the bag completely on low heat with clean dryer balls or tennis balls to break up down clusters and restore loft. After machine drying, leave it laid out or hanging for another 24 to 48 hours before storage.

Review the official Argali sleeping bag care instructions before washing or storing the bag.

Official Product Information

For additional construction details, current manufacturer specifications and sleep-system information, visit the official Alpine 0 Degree Sleeping Bag product page.

Roomy Warmth for Cold Backcountry Nights

The Alpine 0 Degree Sleeping Bag combines high-loft down, draft management, a spacious cut and lightweight fabrics in a package designed for demanding cold-weather trips.

Its contoured hood, 3D footbox, body-mapped baffles, internal phone pocket and pillow connection points contribute to a warmer, more organized and more comfortable backcountry sleeping environment.

For backpackers and hunters who need a cold-weather bag with generous room and a comfort-focused rating, the Alpine 0 Degree Sleeping Bag provides a practical balance of warmth, weight and packability.