When every gram counts and the weather turns nasty, the Outdoor Research Helium UL Bivy delivers bombproof protection without the weight penalty. This ultralight bivy shelter weighs just 511g yet provides fully seam-taped waterproof coverage through its innovative Pertex Shield NetPlus fabric construction. The dual passive ventilation flaps tackle the age-old bivy nemesis of condensation buildup, while the high-volume toe box ensures you won't feel like you're sleeping in a body bag. Whether you're pushing hard on a fast-packing adventure, bivouacking on a multi-day climb, or simply need reliable emergency shelter that won't burden your ultralight backpacking setup, this minimalist shelter sets up quickly with its included DAC aluminum pole and six stake points. The clamshell opening makes entry and exit refreshingly civilized, proving that going ultralight doesn't mean sacrificing comfort or protection when the mountains throw their worst at you.
