Huge fan of this jacket. It folds up so small in my pack, keeps me protected from strong ridgetop winds while on the move, with plenty of airflow to keep me from sweating too much. I throw my puffy and Stella shell over this when I get to the top, and I'm ready to go. This was a game changer for my layering game!

the upjack comes with me every day touring, and often in the springtime can serve as my downhill jacket as well.

This feels like someone re-designed the patagonia houdini in a way that actually has good style and fit.

Ultra light and packs down super small. Also great for going down in the spring, battles the elements surprisingly well. I love this jacket!

The Upjack is incredibly light, breathable and protective against the wind. This piece is perfect for windy days, cold days, and any time that you’d want some protection from the elements on the uphill without putting on your jacket.

I've been wearing Up Jack on a thick undershirt while hiking up in winter Hokkaido, Japan, and it keeps not being too hot nor too cold, as TREW mentioned. The large kangaroo pocket sometimes stores blown snow, but it doesn't causes any problems so far.