Light and Weatherproof!
Unfortunately we haven't had much snow this year so I havent used the Helium as much as I expected but it kept me dry in the one storm I was in. I got it as a light weight "hardshell" for ski touring. It weighs a little over 6 oz and has great water and wind protection, fantastic. No matter how light you're trying to go, if there is any chance weather is coming, there is room in your pack for this jacket (seriously, it packs into nothing). Pack this in your bag along with a small puffy and youre covered for just about any weather. I got a medium and Im 511 165 lbs, it fits well.