Trek TkIII
Best versatile sleeping bag for side sleepers seeking extra room.
This versatile bag bridges the gap between a traditional mummy and a spacious quilt, offering excellent thermal efficiency for three-season adventures. The hydrophobic down insulation ensures reliable warmth even in damp conditions, while the adaptable zipper system allows for easy temperature regulation.
$364.00
at
Sea to Summit
More Trek options
Who it's for
- Campers seeking a flexible sleep system for varying temperatures
- Side sleepers and restless movers who feel restricted in mummy bags
- Backpackers prioritizing lightweight warmth and reliable loft in humid environments
Who should skip it
- Ultralight enthusiasts with minimal pack volume requirements
- Cold sleepers venturing into temperatures near the bag's lower limit
- Ounce-counters who prioritize the lightest possible gear over sleeping comfort
Performance breakdown
Thermal efficiency
650-fill down provides reliable warmth across diverse shoulder-season climates.
Weight-to-warmth ratio
Balances substantial insulation with a packable footprint for multi-day treks.
Sleep comfort
Generous cut allows for natural movement without feeling restricted or tight.
Build durability
Rugged shell fabrics withstand the wear of frequent backcountry use.
Weather versatility
Adapts easily to fluctuating temperatures through thoughtful zipper and ventilation design.
Packability
Compresses well, though slightly bulkier than ultra-lightweight specialized racing gear.
Key Specs
Insulation Type
650 Fill Down
Fill Power
650 cubic inches per ounce
Model Number
402240
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