Interstellar Bivy

Sharing the same name as Outside Magazine's Gear of the Year award winner, the Interstellar AscentShell Bivy is the waterproof, versatile bivy choice for adventurers looking for a little something extra out of their shelter. A newly designed side entry makes getting in and out of your shelter faster and easier than ever before, while innovative zipper design and built-in sombrero allow you to sit up and perform tasks (like cooking and packing) without stepping outside.

Since 2016, Outdoor Research's proprietary AscentShell™ technology uses an electrospun process to create a 3L construction that breathes faster, weighs less, stretches more, and far surpasses the comfort of traditional waterproof membranes. Learn more about the science behind our breathable waterproof AscentShell technology.