After years of user feedback, and decades of product testing and tinkering, Outdoor Research is proud to release a completely redesigned bivy program that harnesses the power of innovative technology and ultralight materials to create a bomber shelter in the most compact construction yet.
This entire line of bivies weigh significantly lighter than their predecessors, and feature a smaller footprint that saves on pack space and weight for convenience, comfort, and effectiveness. Our ultimate goal was to create shelters that weigh less than a single person tent, and the result is a streamlined collection of bivies ideal for thru-hikers, bikepackers, and fastpackers looking to shed ounces and maximize performance.
Browse our bivy sack guide below to find out which features, technologies, and shelter choice is right for you.
Four-season waterproof, durable, and versatile bivy choice for adventurers looking for a little something extra out of their shelter.
Weight: 21 oz. with pole, 19.2 oz without pole
Size: 82” length x 26” top width x 17” top height
Best for: Expedition and Extreme Conditions
Why you’ll love it:
Shares the same name as the Interstellar Jacket, Outside Magazine’s Gear of the Year award winner for its supremely breathable and waterproof AscentShell™ technology.
Newly designed side entry makes getting in and out of your shelter faster and easier, without any butt-to-ground contact.
TPU laminated bivy floor has a bathtub construction that protects you from ground water and rain spray. The fabric’s 40D ripstop also prevents rips and tears.
Removable single pole can add headspace or be left behind to save weight.
Two stake loops to secure shelter down in high wind.
Innovative zipper system uses 6 zipper sliders on mesh and shell to free arms and face, letting you wear your shelter like a jacket for the ability to cook, clean, read, and more – right from the comfort of bed.
Sombrero-style crown provides larger headspace and gear storage.