Outdoor Research Helium UL Vestibule

Expand Your Shelter Without Adding Bulk

The Helium UL Vestibule is a lightweight add-on designed to pair seamlessly with the Helium UL Bivy, creating additional protected space for gear storage, cooking, and shelter from the elements during fast-and-light adventures.

Built from lightweight silicone-coated ripstop nylon, it adds valuable weather protection with minimal impact on pack weight or packed size. The vestibule creates a sheltered entrance area that helps keep packs, boots, and wet gear protected while also improving airflow around the bivy opening.

Designed for ultralight backpacking, alpine climbing, bikepacking, and minimalist overnights, the Helium UL Vestibule pitches quickly using a trekking pole and packs down small enough to disappear into your kit.

Why You'll Love It
Ultralight Expansion - Adds covered storage and weather protection with minimal extra weight
Improved Comfort - Creates usable sheltered space outside the bivy entrance
Weather Resistant - Silicone-coated ripstop nylon helps protect gear from rain and wind
Fast & Compact - Quick trekking-pole setup with a tiny packed size
Perfect Companion - Designed specifically for the Helium UL Bivy

Key Features
Compatible with the Helium UL Bivy
Lightweight silicone-coated ripstop nylon construction
Trekking-pole-supported pitch
Provides sheltered gear storage space
Compact pack size for minimalist adventures
Quick and simple setup
Weather-resistant construction

Materials
Fabric: 15D silicone-coated ripstop nylon

Specifications
Weight: Approx. 160g
Construction: Ultralight weather-resistant vestibule
Setup: Requires trekking pole
Compatibility: Outdoor Research Helium UL Bivy

Best For
Fastpacking
Alpine climbing
Bikepacking
Ultralight backpacking
Minimalist shelter systems