how to tell how warm a puffy jacket is

A backpacker hiking the Dawson Pass Trail in Glacier National Park.

How You Can Tell How Warm a Down Jacket Is

By Michael Lanza

While sleeping bags have temperature ratings, with down jackets and other insulated jackets, there exists no easy way to determine how warm any specific garment will be without wearing it outside. But despite the absence of a precise metric for gauging the warmth of down and synthetic puffy jackets, there are ways to assess a specific jacket’s relative warmth before you even see it, using simple metrics. This article will explain how to do that.

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