RAB says about the Xenair Alpine Flex Jacket
Light, packable active insulation with fleece side panels for extra breathability and mobility. Highly adaptable whether worn as a warm layer or technical outer, it responds to your output to keep you comfortable on tough ascents in mixed conditions. Body mapped insulation with zoned areas of uninsulated panels to aid thermoregulation. Lightweight YKK® VISLON® centre front zip with chin guard. Precurved and articulated sleeves for improved fit and movement. 2 YKK® zipped hand pockets, one of which doubles as an integrated stuff sack with harness attachment loop Lightweight single sided rear hem adjustment with anti snag tether