Alpine 20 Degree Sleeping Bag

Alpine 20 Degree Sleeping Bag is an ultralight down sleeping bag designed for backpacking, backcountry hunting and cool-weather camping. It combines an independently ISO-tested 20°F comfort rating with 850+ Dry Loft Down, a roomy interior, insulated draft protection and a compact packed size for reliable rest away from home.

Why Choose the Alpine 20 Degree Sleeping Bag?

A quality backcountry sleep system must balance warmth, weight, packed volume and comfort. This sleeping bag is designed for users who want efficient insulation without the narrow, restrictive feel common in many lightweight mummy bags.

The Regular version weighs approximately 1 pound 14.5 ounces, while the Long version weighs approximately 2 pounds 1.4 ounces. Both sizes provide a generous 64-inch shoulder girth, making the bag suitable for broader shoulders, side sleepers and people who change position frequently during the night.

Key Alpine 20 Degree Sleeping Bag Features

850+ Dry Loft Down Insulation

The bag uses 850+ Argali Dry Loft Down developed with Allied Down and Feather. The down is responsibly sourced and RDS certified, with no wax-based waterproof coating that could encourage clumping or reduce long-term loft.

The Regular size contains approximately 20 ounces of down fill, while the Long size contains approximately 21 ounces. High-fill-power down creates an efficient warmth-to-weight ratio and compresses well for transportation.

ISO-Tested 20°F Comfort Rating

The Alpine 20 Degree Sleeping Bag is independently tested to ISO standards and marketed around a comfort rating rather than only a survival limit. This approach gives backpackers and hunters a more practical reference when selecting a sleeping bag for expected nighttime conditions.

Temperature performance still depends on the complete sleep system, including the sleeping pad, shelter, clothing, humidity, wind and individual metabolism. Use an appropriately insulated sleeping pad and prepare for weather colder than the forecast.

Body-Mapped Baffle Construction

Differential-cut fabric combines vertical and horizontal baffles with internal flow gates. This construction helps place the down where warmth is needed while limiting unwanted insulation migration.

Keeping the down distributed evenly reduces thin areas and helps preserve consistent loft when the sleeper turns or changes position.

Roomy Interior for Natural Sleep

The internal dimensions measure approximately 64 inches at the shoulders, 58 inches at the hips and 40 inches at the feet. This shape offers useful movement without creating excessive empty space that would be harder to warm.

The Regular model fits users up to approximately 6 feet 1 inch tall. The Long model fits users up to approximately 6 feet 7 inches tall.

Insulated Draft Tubes and Contoured Hood

Overfilled draft tubes along the zipper and face opening help retain warm air inside the bag. A 3D contoured hood supports the head and reduces open spaces where heat can escape.

Adjust the hood and face opening to limit drafts while maintaining comfortable airflow. The design works together with the body-mapped baffles to create a protected sleeping environment.

3D Footbox for Better Warmth

The shaped footbox follows the natural position of the feet and provides space around the toes. This helps prevent the sleeper from pressing the down flat against the end of the bag and creating cold spots.

For best performance, avoid storing boots, bottles or rigid items inside the footbox where they may compress the insulation or damage the lightweight fabric.

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 a comfortable next-to-skin feel.

The outer fabric can help manage light surface moisture, but the sleeping bag is not waterproof. Protect it from rain, wet ground and heavy shelter condensation.

Two-Way Anti-Snag Zipper

A two-way YKK #5 zipper allows convenient entry and controlled ventilation. An anti-snag cover helps keep the thin shell fabric away from the zipper path.

Guide the zipper carefully around curves and tension points. Avoid pulling forcefully if fabric enters the slider.

Alpine 20 Degree Sleeping Bag Specifications

• Temperature rating: Independently ISO-tested 20°F comfort rating
• Fill power: 850+ Argali Dry Loft Down
• Down fill weight: 20.0 oz Regular; 21.0 oz Long
• Total weight: 1 lb 14.5 oz Regular; 2 lb 1.4 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 5.75 in
• Stuff sack size: Approximately 8 × 14.5 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 20 Degree Sleeping Bag, a compression stuff sack for transportation and a cotton storage sack for home storage.

The compression sack is designed for travel, not permanent storage. After every trip, remove the sleeping bag, allow it to dry completely and store it loose so the down can remain lofted.

Integrated Pillow and Phone Storage

Connection points inside the hood work with the Elite Dream Backpacking Pillow. The attachment system helps keep the pillow positioned as you move during the night.

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

Complete Your Backcountry Sleep System

Pair the Alpine 20 Degree Sleeping Bag with the Elite Dream Backpacking Pillow for adjustable head support and a more organized hood area.

For colder trips, compare it with the Alpine 0 Degree Sleeping Bag. Browse the complete Sleeping Bags collection for related sleep-system products available from Calenvia.

Care and Long-Term Storage

Never store the Alpine 20 Degree Sleeping Bag permanently in its compression sack. Hang it in a dry closet, lay it flat in a protected location or place it loosely inside the included cotton storage sack.

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

Avoid regular detergent, bleach, fabric softener, dry cleaning and machines with a center agitator. Dry the bag completely on low heat with clean dryer balls or tennis balls, then leave it hanging or laid out for another 24 to 48 hours before storage.

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

Choose the Right Sleeping Pad

A sleeping bag insulates the body from surrounding air, while a sleeping pad limits heat loss into the ground. Select a pad with an R-value appropriate for the expected season and conditions.

Review Argali’s sleeping pad and R-value guide when planning a complete backcountry sleep system.

Lightweight Comfort for Cool Backcountry Nights

The Alpine 20 Degree Sleeping Bag combines premium down, honest temperature testing, a roomy fit and lightweight materials in a compact package for demanding trips.

Its contoured hood, 3D footbox, insulated draft tubes, anti-snag zipper, internal pocket and pillow connection points support restful sleep without adding unnecessary bulk.

For backpackers and hunters who need a warm, spacious and packable three-season bag, the Alpine 20 Degree Sleeping Bag delivers a practical balance of comfort, warmth and low weight.