Outdoor Research Helium UL Vestibule Lightweight Bivy Shelter Extension

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