I've used this only in spring conditions thus far. The only drawback then is that it's not very water resistant, even as advertised... Don't use this as a rain jacket. However, this will work well in dry, cold environments, with snow. (-10 celsius and colder). Fit is great, I am 5'10, 158-172lbs (Depending!) And the medium fits trim and well in chest and waist. This also fits well under a climbing harness. Good fit with overhead arm movements too. Good is nice and large for helmet coverage Layering for active use is also easy & comfortable. This is also a very stylish jacket that works well with a variety of fashion styles.