I've been using this for cycling in cool weather or as a mid-layer with a gortex shell in cold weather. It will be a key component of my upcoming alpine field work. The fit is generous, the hood is excellent, and the materials feel great woven together. Fit: I am a M sized man but got the L for a bit of extra room in case I wear a sweater under this. Fit is great. Hood: The hood is amazing. Google this jacket on Smarwool's site to get an idea. It does fit under helmets or snug rain jacket hoods great. Materials: The synthetic outerlayer is a good abrasion/snag-resistant protection for the mid-weight merino wool interior. Very happy with this jacket. The quality of construction is very reassuring.