Sea to Summit Spark Sleeping Bag
Best ultralight insulation for weight conscious long distance backpackers.
This is the gold standard for ultralight backpackers who treat every ounce like a liability. By stripping away excess bulk and focusing on high-loft insulation, it delivers serious warmth in a package that barely registers in your pack. You sacrifice a bit of wiggle room, but the weight savings are undeniable.
$349.00
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Who it's for
- Ultralight backpackers prioritizing minimal pack weight and maximum warmth.
- Thru-hikers with limited pack volume needing efficient gear storage.
- Alpine climbers and campers facing unpredictable weather or condensation.
Who should skip it
- Active sleepers who feel claustrophobic in tight-fitting bags.
- Rugged adventurers who are rough on their gear in harsh environments.
- Warm sleepers who need to vent their feet for comfort.
Performance breakdown
Packability
Compresses down to a tiny two-liter volume for effortless storage.
Weight Efficiency
At under a pound, it sets the standard for ultralight backpacking.
Thermal Regulation
High-loft down provides exceptional warmth for its minimal weight class.
Moisture Management
Water-resistant shell fabric effectively protects the down from damp conditions.
Zipper Performance
Snag-free YKK hardware ensures smooth entry and exit every time.
Ergonomic Design
Anatomical footbox and hood maximize heat retention without restricting movement.
Key Specs
Weight
0.875 lbs
Temperature Rating
45 degrees Fahrenheit
Insulation Type
850+ fillpower goose down
Shell Material
10D nylon
Lining Material
10D nylon
Compressed Volume
2 liters
Zipper Location
Full-length
Water Resistant
Yes
Sleeping Bag Shape
Mummy
Has Draft Collar
Yes
Know before you buy
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Ask Metto anything about the Sea to Summit Spark Sleeping Bag before you decide.