For the ultimate balance in warmth and breathability, the RAB lightweight Insulated Xenair Alpine Light Jacket excels during stop start activites. A combination of recycled dual weight insulation and breathable fabrics allows you to push for the summit and keep warm at the top, with inbuilt body mapped insulation to maintain warmth and aid thermoregulation. Additional features include a helmet compatible adjustable hood, articulated sleeves for mobility and reliable waterproof YYK zips throughout. Technical details Ideal use: Hiking, trekking, mountaineering Materials: Main body: 100% 20D Pertex Quantum Air nylon Lining: 100% 20D Recycled Nylon Insulation: 40-60gsm Primaloft Gold Insulation Active+ (55% recycled) DWR treated Key features: Adjustable helmet compatible hood with semi-elasticated opening and single lightweight rear gathering YKK zipped inner packaway chest pocket with harness attachment loop Body mapped insulation to maintain warmth and aid thermoregulation Lightweight single sided rear hem adjustment with anti snag tether Elasticated gusset at the cuff for optimum fit and comfort No5 YKK centre front zip with lined chin guard 2 YKK concealed zipped hand pockets Articulated sleeves for mobility