MONTANE Alpha Guide Jacket - AW16 Outer fabric Pertex Microlight Stretch is windproof, showerproof, fast drying and features an exceptional durable water repellency Polartec Alpha insulation is a remarkable, hyper breathable and highly packable insulating fill Arms, hood and shoulders feature Mt. Thermo X Stretch with a brushed fleece inner, ant-pilling outer face and high stretch for dynamic body movement PEAQ Hyper, an exceptionally breathable interior lining in front and back of jacket Mt. Thermo X Stretch fleece hood that provides a snug fit and can be worn underneath a helmet