The Haglofs Men's Roc Ice Insulated Jacket uses a 3 layer Gore Tex shell to fend off sleet and snow, and is then insulated with a 100% recycled synthetic fill to provide additional warmth on those extra cold days in the mountains. Haglofs also dual layered the multi channel fibers so they trap more more air and retain more heat. The jacket itself is rigged with two underarm ventilation zips so you can lose excess heat quickly to avoid perspiration, and the Gore Tex membrane is highly breathable to provide additional air flow throughout the jacket. The helmet compatible hood is three way adjustable and features a laminated peak. The articulated sleeves give your arms excellent range of motion, and the integrated drawcord at the hem can be tightened down to trap even more heat within the jacket.