Video loading...
Editors' Choice Awards 2019: Therm-a-Rest Hyperion 20°F
Heading out the door? Read this article on the new Outside+ app available now on iOS devices for members! Download the app.
If you’re ruthless about cutting weight, you’ll like the Hyperion. It’s one of the lightest models in this temp category, thanks to a narrow, heat-saving shape (shoulder circumference is 57 inches), a half-length zipper, and 900-fill goose down.