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delivering a precise balance of warmth
Midsole: Hard
Packable & Minimalist - Reduces bulk in your pack
Long-lasting effectiveness (up to 6 months)
Insulation: Aluminium film layers
Outdoor Research Helium UL Bivy - Ultralight Waterproof Bivy Shelter (Pertex® Shield, 2026) feature_evowrap delivering a precise balance ofOutdoor Research Helium UL Bivy Waterproof Protection Without the Weight The Helium UL Bivy is a minimalist shelter built for climbers, fast packers, and ultralight adventurers who need reliable protection without the bulk of a traditional tent. Updated for 2026, it uses bluesign approved Pertex Shield NetPlus fabric, delivering fully waterproof, breathable performance in a compact, packable design. The fully seam taped construction and PU coated
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