The North Face Assault Bivy Sack
Best ultralight shelter for minimalist mountaineers and alpine climbers.
A minimalist shelter that prioritizes weight savings without sacrificing essential protection. The internal pole structure provides surprising headroom, making it a comfortable choice for solo backcountry adventures.
$220.00
at
Al's Sporting Goods
More Assault options
Who it's for
- Mountaineers seeking a dry sleep environment in variable weather
- Ultralight backpackers prioritizing low pack weight for technical climbs
- Solo adventurers who want more space than a standard bivy
Who should skip it
- Campers in high-humidity environments who require maximum airflow
- Budget-conscious hikers looking for a more affordable emergency shelter
- Backcountry travelers who prefer extra room for gear and movement
Performance breakdown
Weight Efficiency
Ultralight build makes it an easy carry for fast-and-light missions.
Weather Protection
FUTURELIGHT laminate offers reliable, breathable defense against harsh mountain storms.
Interior Livability
Internal pole structure provides just enough headroom to avoid feeling claustrophobic.
Packability
Compact footprint slides effortlessly into any tight corner of your pack.
Ventilation Control
Two-way zipper design effectively manages condensation during humid or active nights.
Durability
Rugged ripstop floor fabric withstands abrasive terrain without adding unnecessary bulk.
Key Specs
Weight
1.75 lbs
Minimum Trail Weight
1.625 lbs
Floor Area
21.31 Square Feet
Packed Dimensions
9.5 inches x 5.5 inches
Primary Fabric
Recycled Nylon
Canopy Fabric
20D Nylon
Floor Fabric
40D Nylon Ripstop with 3000 mm PU/silicone coating
Sleep Capacity
1 Person
Water Resistant
Yes
Activity
Backpacking, Camping
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