I have been using my R2 as my go to midlayer for skiing most days. The Hi-Loft Polartec is very warm, but the use of Power-Grid in the underarms makes it much more breathable, and therefore versatile. The fit is fairly trim in the body which is ideal for a midlayer. However, the sleeves are on the baggy side, which I think may be due to stretching over time as my jacket is several years old, and this may have been fixed on newer models. The neck is very comfortable when fully zipped, and the 3 pocket configuration works great. Overall: the hybrid fleece configuration makes this a versatile midlayer for use in a wide range of temperatures.