If you like to be high up & surrounded by snow, & you are looking for a low profile insulating layer that will also keep out the cold wind, then the Heat Treat Hoody from Black Diamond is a jacket definitely worth considering. The outer is constructed using Windstopper Active Shell that is 100% windproof, the inner is made out of the uber lightweight Pertex Quantum fabric. Then in between these layers is a hi-loft 65 g/m² Pirma Loft Silver filling to give you that compressible & reliable warmth. The great part about using Prima Loft is that not only is its warmth to weight ratio and compressibility stupidly great, it also retains most of its thermal properties when wet & it moves moisture away from your body very effectively. This jacket has plenty of storage space with its two chest pockets, two internal drop pockets & two hand warming pockets. The only thing you have to do is remember where you have put stuff. It has an insulated, adjustable helmet compatible hood with a soft brushed microsuede collar lining for extra comfort & moisture wicking properties. There are YKK Vislon Aquaguard zips on the centre and chest pockets. All of these properties make the Heat Treat Hoody a great stand alone piece; however, due to the low profile build & breathability it also makes a superb midlayer when the weather turns really nasty. Insulated, adjustable, helmet-compatible hood YKK® Vislon® Aqua Guard® center front zipper Brushed microsuede collar lining Zippered chest pockets with YKK® Vislon® Aqua Guard® zippers Zippered hand pockets Two internal drop-in storage pockets Stretch panel low-profile cuffs Drawcord hem