Hi, I'm Tom, Athlete Ambassador for Outdoor Research, and this is the Helium HD jacket. There are times when you hit the trail or head into the mountains where there's the potential for the weather to turn bad and stay that way. The Helium HD jacket is totally waterproof and has all of the features of a heavier Alpine shell while remaining light and compressible like the rest of the Helium series. I used it on multi-day trips in the North Cascades where the weather could go either way. If I don't use it, it only costs me ounces in my pack. And if it rains for days, I have a fully-featured jacket that will keep me dry and warm. The Helium HG jacket is fully-featured and lightweight, making it a great backcountry shell.
Shop the Men's Helium HD.
Shop the Women's Helium HD.