Outdoor Research Helium UL Bivy - Ultralight Waterproof Bivy Shelter (Pertex® Shield, 2026) Vestibule option:UL Bivy Modular System - Compatible with

Modular System - Compatible with Crescents macros for expanded setups

and a snug low-volume fit

slings and anchor systems

Turn to switch grips instantly

A hooded nose with a small gate notch helps reduce snagging

Outdoor Research Helium UL Bivy - Ultralight Waterproof Bivy Shelter (Pertex® Shield, 2026) Vestibule option:UL Bivy Modular System - Compatible withOutdoor 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