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Compare Best Bivy Sacks head to head

Pick any two picks from this list and see specs, current price, pros, cons and reader ratings side by side.

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Helium Bivy

#1 on this list

Helium Bivy

Outdoor Research

Pertex Shield with a single hoop pole. The reference for fast-and-light alpine nights.

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Ridge Raider

#2 on this list

Ridge Raider

Rab

eVent bivy-tent hybrid with a real vestibule. Wall bivouacs and winter ridges.

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Specs side by side

Helium Bivy versus Ridge Raider specifications
SpecHelium BivyRidge Raider
Weight18 oz (approx)
FabricPertex Shield 2.5LeVent Waterproof Breathable
Waterproof RatingExcellent
BreathabilityVery Good
Packed SizeSmall water bottle
Pole SystemSingle aluminum hoop
MakerRab
ModelRidge Raider
CategoryBivy-Tent Hybrid
Primary UseAlpine, Winter, Expeditions
Sleeping Capacity1 person

What our reviewers liked and didn't

Helium Bivy

  • Exceptional weight-to-protection ratio
  • Pertex Shield offers good breathability for a bivy
  • Single pole creates crucial headroom
  • Highly packable and compact
  • Reliable weather protection for its class
  • Can still have condensation in humid conditions
  • Limited space, not for lounging
  • Requires a ground cloth for optimal durability
  • Not ideal for prolonged, multi-day downpours

Ridge Raider

  • Integrated pole creates excellent head room and small vestibule
  • eVent fabric offers superior breathability and weather protection
  • Allows comfortable sitting and gear management inside
  • Highly durable, expedition-grade materials and construction
  • Much more livable than traditional bivies
  • Heavier and bulkier than minimalist bivies
  • Higher price point compared to basic options
  • Still more restrictive than a full tent

Prices change constantly — the figure shown is the last verified catalog price, and the buy buttons always go to the current listing.