Outdoor Research Helium UL Bivy and Helium UL Vestibule Review - ''The Helium UL Bivy’s strongest features are its fast setup, small footprint, low profile, proper bug protection and better-than-basic headroom.''
Posted by Andy Neil on Jun 16, 2026
The Outdoor Research Helium UL Bivy makes the most sense when you want the smallest possible weatherproof shelter, a quick pitch and a really low-profile camp. It is more livable than most bivy bags I’ve tried, thanks to the hoop, which elevates and provides welcome space, but it is still very much a bivy. That means limited living space, careful venting and being realistic about condensati
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What is VerticalX ECO SR Insulation?
Oct 01, 2025
Built with lightweight, recycled bluesign® approved fabrics, the Vesper features VerticalX™ ECO SR insulation, which balances warmth, stretch, and breathability. Its wind- and water-resistant shell provides protection from unpredictable weather while maintaining comfort during high-output activities. Thoughtful design details like the insulated hood with brim, elastic cuffs, and adjustab
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