Mammut Comfort Fiber Bag
Best sustainable winter sleeping bag for eco-conscious cold-weather campers.
This is the rare winter-ready bag that prioritizes sustainability without sacrificing warmth or versatility. While the synthetic fill adds a bit more bulk than premium down, the clever blanket-mode conversion and eco-conscious construction make it an incredibly practical choice for campers who value comfort and conscience over shaving every gram.
$260.00
at
Mammut
Who it's for
- Backpackers camping in damp or humid winter conditions
- Mountaineers needing reliable warmth for extreme cold expeditions
- Campers prioritizing low-maintenance gear and easy cleaning
Who should skip it
- Ultralight hikers needing to minimize pack weight and volume
- Long-term users seeking gear with multi-year loft longevity
- Travelers who need gear that dries quickly overnight
Performance breakdown
Thermal Efficiency
Mummy silhouette and draft collar effectively lock in critical body heat.
Sustainability Footprint
Leading the industry with recycled materials and waste-reducing manufacturing patterns.
Versatility
Central zipper allows for quick conversion into a comfortable blanket.
Zipper Reliability
Upgraded YKK hardware minimizes frustrating fabric snags during midnight adjustments.
Packability
Synthetic fill offers solid warmth but remains bulkier than premium down.
Ergonomic Comfort
Anatomical foot box provides ample room without sacrificing thermal performance.
Key Specs
Item number
2410-03060
Zipper side
Neutral
Comfort temperature (EN 13537
2012): 16 °F
Comfort temperature limit (EN 13537
2012): 5 °F
Extreme temperature (EN 13537
2012): -36 °F
Fill weight (Size L)
1110 g
Total weight without stuff bag (Size L)
2519 g
Packing volume (Size L)
19.70 l
Maximum body size (Size L)
195 cm
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Ask Metto anything about the Mammut Comfort Fiber Bag before you decide.