Designed for stop-start activities in the mountains where core body temperature regulation is key, the Montane Women's Halogen Alpha Jacket combines ultra breathable, lightweight Polartec Alpha with an open structure Pertex Microlight outer shell. This jacket will allow you to maintain your focus without needing to stop to relayer.Highly air permeable Pertex Microlight Rip-stop fabric has an open structure, enabling the encased insulation to breathe fully. It also benefits from stretch properties and a durable water repellency. 50g/m² Polartec Alpha synthetic insulation in the body and sleeves is fast drying, lightweight and also regulates internal temperatures. Lightweight Hypervent lining is used behind the Polartec Alpha areas to ensure optimum breathability. Technical tailoring around the arms to prevent arm lift raising the lower hem while reaching high.Stretch bound face aperture and a close fitting hood designed to fit over winter headwear. Two A-line hand-warmer pockets with covered YKK reverse coil zips positioned well clear of backpack or climbing harness belt. Internal YKK concealed chest pocket, designed to fit GPS or mobile phone securely. Ergonomic lightweight zip pullers make use easier when wearing gloves.