Ideal for alpine pursuits and extreme weather, the Outdoor Research Alpine AscentShell bivy combines the cult-classic Alpine Bivy with Helium AscentShell tech for drastically improved breathability.

bivy-sacks

When clear nights prevail but insects threaten to reduce your blood volume, this bivy is the sleeping chamber of choice.

bivy-sacks

Get ready for fast-and-light missions with this clamshell-opening Outdoor Research Helium bivy. Its lightweight, durable fabric with Diamond Fuse technology gives it its ultralight prowess.

bivy-sacks