Outdoor 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 floor keep you protected from the elements, while dual passive ventilation flaps help reduce condensation during the night.

A clamshell opening and single DAC aluminium pole create a surprisingly spacious interior for a bivy, with a high-volume toe box that improves comfort on longer missions. Quick to pitch and easy to pack, it's an ideal solution for exposed terrain, alpine routes, and fast-and-light trips.

Why You'll Love It

• Ultralight Protection - Full weather protection in a compact, packable shelter
• Waterproof & Breathable - Pertex® Shield NetPlus® fabric with fully seam-taped construction
• Reduced Condensation - Dual ventilation flaps improve airflow
• Comfort-Focused Design - High-volume toe box for improved space and comfort
• Quick Setup - Simple pole structure and stake system

Key Features

• 2026 updated design
• Clamshell opening for easy access
• Dual passive ventilation flaps
• Single DAC aluminium pole system
• Six stake loops + four aluminium stakes included
• Reflective trims for visibility
• No-see-um mesh panel

Materials

• Upper: 2.5L Pertex® Shield NetPlus® with hydrophilic laminate
• Fabric: 100% recycled nylon 30D ripstop
• Floor: 100% nylon 40D ripstop with PU coating

Specifications

• Weight: 511g (18.02 oz)
• Construction: Fully seam taped
• Performance: Waterproof, breathable, lightweight

Best For

• Alpine climbing
• Fastpacking
• Lightweight backpacking
• Emergency shelter use