Description The Outdoor Research Helium UL Bivy is an ultralight, minimalist shelter designed for solo backcountry adventures where weight savings and weather protection are critical. Built with PertexA(R) Shield waterproof fabric, it provides reliable protection from rain, wind, and condensation while remaining highly breathable for overnight comfort. The clamshell opening and single-pole structure create additional headroom for improved livability, while the compact, packable design makes it ideal for fastpacking, alpine missions, and emergency shelter use. Lightweight yet durable, the Helium UL Bivy delivers dependable protection for minimalist hunters who need efficient shelter without added bulk. Specs Weight 18.02 oz Sleep Capacity One Stakes 4 aluminum stakes included Poles One Waterproof Yes Fabric 2.5L Pertex Shield Netpluswith Hydrophilic laminate100% Recycled Nylon 30D ripstop100% Nylon 40D ripstop with PU coated floor Manufacturer Warranty Lifetime Guarantee