I use a Sporthill Travellor jacket underneath my Showers Pass Century rainjacket that gives me all the protection I need. It's unbelievable how light these jackets are yet still protect me from the elements all the way down to -12. Believe me, I did it. Down in the negative digits I added a fleece vest that I took off half-way thru my 45 min morning commute. Sporthill is incredible clothing that will last you many years. Anything with their 3SP will work in these frigid temps. You'll barely feel it.