Three Wire Hooped Bivy

Big Agnes Three Wire Hooped Bivy – Lightweight Four-Season Hooped Bivy Shelter

The Big Agnes Three Wire Hooped Bivy is a lightweight, quick-deploy bivy shelter featuring a supported pole structure for year-round adventures. Designed for extreme conditions where minimal pack weight is essential, it delivers dependable weather protection in a highly compact package. Constructed from premium materials and equipped with a closable mesh window for ventilation, this minimalist shelter is ideal for fast-and-light backpacking, alpine missions, and emergency bivouac use. Its compact packed size makes it easy to carry as a reliable backup shelter on any adventure.

Features

• Ultralight four-season shelter designed for minimalist solo adventures.
• Single-pole architecture increases headroom and interior comfort.
• Upper third of the bivy unzips to create a larger entry opening.
• Shallow bathtub floor provides weather protection and structural support.
• Head-end window offers two closure options: mesh-only ventilation or fully zipped weather protection.
• Three external guy-out loops help keep the shelter stable in challenging conditions.
• Compact enough to serve as an emergency bivy on extended expeditions.

Technical Specifications

• Trail Weight: 539 g
• Total Weight: 624 g
• Packed Size: 10 x 36 cm
• Floor Area: 1.49 m²
• Peak Height: 51 cm

Materials

• Upper: Pertex® Shield three-layer fabric consisting of a tightly woven DWR-treated nylon face fabric, microporous membrane, and tricot backer, with no intentionally added PFAS.
• Floor: Proprietary HyperBead™ 30D nylon ripstop with a 1200 mm waterproof polyurethane coating, PFAS-free.
• Mesh: Polyester mesh.
• Pole: DAC lightweight aluminum pole.
• All seams are taped with solvent-free waterproof polyurethane tape with no PVC or VOCs.
• Includes 3 x 6" Dirt Dagger™ UL stakes that can be buried as deadman anchors.