Highly Breathable and Comfortable Fleece
The purpose of this jacket is to provide mid layer warmth under a shell in Winter or in my case to provide highly breathable outerwear in the summer evenings in the Alpine. I traded in my Nano Puff for the R2 because frankly the Nano Puff doesn't breath and I would quickly get sweaty/clammy if I was in cool temps (i.e., 50's to low 60's). The R2 is more versatile. In cool temps I can have it as an outer layer, knowing that any significant heat build up will easily escape before I sweat, in colder weather I can throw on a wind shirt/shell over it to block any wind.