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Helium UL Bivy
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Helium UL Bivy offers ultralight waterproof protection with breathable comfort for fast alpine missions
What Our Gearhead® Experts Are Saying:
"I used the Helium UL Bivy on a fastpack trip in the Tetons—kept me dry through an unexpected storm and ventilated better than any bivy I’ve used. The updated Pertex Shield fabric is super light and surprisingly tough, and I love that it’s made from recycled fishing nets."
For minimalist mountain missions where every ounce counts, we rely on the Outdoor Research Helium UL Bivy to deliver weatherproof protection without compromise. Engineered with 2.5L Pertex® Shield NetPlus®—a recycled nylon fabric made from repurposed fishing nets—this bivy balances sustainability with serious performance. It’s waterproof, highly breathable, and light enough to disappear into our pack until it’s time to bed down under the stars.
The 2026 update adds smart features like dual passive ventilation flaps for airflow and condensation control, plus a high-volume toe box that gives our feet space to move and our bag room to loft. The clamshell opening makes for quick and easy entry, and the single DAC pole lifts the canopy just enough to keep the mesh off our face while sleeping. Whether we're weathering a summit push or sneaking in a backcountry overnight, the Helium UL Bivy is our go-to for dependable protection in the lightest form possible.
Details
- Recommended for alpine fastpacking, ultralight backpacking, and emergency shelter use
- Waterproof 2.5L Pertex Shield NetPlus shell made from recycled fishing nets
- PU-coated 40D ripstop nylon floor adds durability and moisture protection
- Highly breathable and fully seam-taped for all-weather use
- Updated design includes dual passive vent flaps for airflow and condensation reduction
- Clamshell entry for easy access with integrated No-See-Um mesh for bug protection
- Single DAC aluminum pole adds structure and lifts fabric away from the face
- High-volume toe box improves sleeping comfort and bag loft
- Item #ODRZ97X
- Material
- 2.5L Pertex Shield Netplus
- Poles
- yes
- Ventilation
- 40sq in
- Seams
- fully taped
- Interior Height
- 28in
- Packed Weight
- 18oz
- Manufacturer Warranty
- limited lifetime
- Activity
- backpacking
Outdoor Challenges, Solved
Outdoor Research applies the research method to solve the most demanding challenges faced outdoors. This gear and commitment to innovation stand the test of time.