This is now my go-to jacket for everything, especially running and cycling. I wondered if the tiny bit of insulation in the chest would do anything at all, but after many a cold Colorado run and bike, my doubt is put to rest. Because this is so lightweight, and has a snug-fitting hood, it is the best adjustable layer you'll wear. It layers well when paired with anything, and packs small enough I have held it in my hands for 10 miles on a run.
The sleeve/hood material is really thin, barely a windbreaker thickness, so don't expect this to be the only thing covering your skin when it's below 20 degrees and you're moving at any speed.
The hood zips so snug it fits right at your mouth/chin, and can be uncomfortable sometimes if you're a hairy person.
(Posted on 2/13/2018)