Mammut Tyin MTI Sleeping Bag
Best synthetic sleeping bag for extreme, damp, and cold-weather expeditions.
Built for the most unforgiving environments, this synthetic bag excels where down fails. It prioritizes moisture resistance and thermal retention, making it a reliable shelter for damp, sub-zero expeditions where keeping dry is as important as staying warm.
$327.99
at
Xtremeinn
Who it's for
- Winter mountaineers tackling sub-zero environments
- Backpackers venturing into damp or unpredictable climates
- Expedition climbers prioritizing thermal efficiency and durability
Who should skip it
- Ultralight hikers needing compact, lightweight gear
- Budget-conscious campers seeking general-purpose equipment
- Three-season adventurers needing a versatile, multi-use bag
Performance breakdown
Thermal efficiency
Synthetic insulation maintains critical warmth even in soaking wet conditions.
Moisture resistance
PFC-free DWR treatment effectively sheds snow and condensation during long expeditions.
Durability
Rugged construction withstands the harsh abrasion of tundra and taiga environments.
Weight-to-warmth ratio
Heavy synthetic fill prioritizes reliable warmth over ultralight packability.
Ethical manufacturing
Fair Wear certification ensures transparent, responsible labor practices throughout production.
Fit versatility
Multiple size options allow for a precise, heat-trapping fit for everyone.
Key Specs
Item number
2410-03220
Zipper side
Neutral
Main material
100% Polyamide
Filling
100% Polyester
Lining
100% Polyester
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