Big Agnes Anthracite Alpenglow 20° Sleeping Bag

The bag that goes everywhere. The Anthracite 20° is a traditional mummy built to pack down small, hold its heat, and shrug off the damp — whether you're chasing summer miles deep in the backcountry or just talking the kids into one more backyard campout. FireLine™ Pro Eco recycled synthetic insulation traps warmth through cold nights, while recycled shell and lining fabrics carry a moisture-repellent finish made without intentionally added PFAS, so you stay dry without the harsh chemistry.

This run wears Big Agnes's limited-edition Alpenglow print, released to mark 25 years of building gear from Steamboat Springs. Est. 2001 — and still earning its keep.

Warm, light, and honestly versatile, this is the kind of bag you stop thinking about and just grab on the way out the door.

Why it works

• All-gender design tuned for technical, lightweight performance on and off the trail
• Traditional mummy cut for low weight and better body-heat retention
• Contoured hood that follows the shape of your head, with an insulated draft tube along the upper opening
• Oversized no-draft collar and no-draft zipper to seal out the cold
• One-handed low-profile cordlock to uncinch the hood without fumbling
• 65"/165cm YKK #5 anti-snag locking two-way zipper, with a zipper garage on the sleeper's left
• Mates with right-zip (Women's) bags to share warmth tent-side
• Interior loops for a warmth-boosting liner (sold separately); exterior loops for hang-drying and storage
• Synthetic fill keeps insulating even when conditions turn wet

The specs (Regular)

• Temp rating: 20°F
• Total weight: 2 lb 12 oz
• Total fill weight: 30 oz
• Compressed size: 9" x 9"
• Stuff sack (included): 14L, 8" x 17.5"
• Max user height: 6'0"
• Shoulder / hip / foot girth: 60" / 54" / 36"
• Pad compatibility: works with any pad size or style — go higher-insulation in colder conditions
• Sizes: Regular, Long Regular

Backed by the Big Agnes Limited Warranty against manufacturing and material defects.