The jacket is warm but breathes well, and has the nice flex arm panels for stretch while still retaining a nice form factor. The pit vents are awesome as well as the integrated hood should it be needed. The versatility and utility of the Zerodark are hard to beat in such a stylish garmet. I haven't put it through the ringer enough to test stitching and reinforced areas, but my initial assessment leads me to believe it'll hold up just fine. Go get this jacket, you'll love it!