If you're heading for the likes of the Himalaya, the Women's Positron Pro is a down-filled jacket with zoned construction to optimise warmth and mobility while minimising bulk, so you can endure prolonged exposure to very cold conditions. Designed for mountain and expedition use up to 6000m, the Women's Positron Pro Jacket uses a Pertex Quantum Pro shell to provide protection from the weather, and is filled with the highest quality 800 fill power ethically-sourced down. Box-wall construction on the torso, hood and upper of arms provides extra insulation on more exposed areas, while stitch-through construction on the underarms and side panels allows increased mobility while reducing bulk, weight, and packsize. A two-way front zip with synthetic insulated baffle behind provides maximum warmth, and helmet compatible down filled hood has wired peak and face baffle. Concealed hood adjusters are easy to use with gloved hands. The Women's Positron Pro is optimised to offer the perfect balance of mobility, comfort, and protection in very cold conditions. Pertex Quantum Pro Fabric Pertex Quantum Pro uses an ultra-thin water-resistant coating to provide increased weather resistance for use in extreme conditions. By combining a tightly woven face fabric with a microporous coating, Pertex Quantum Pro delivers a very high level of water resistance whilst remaining lightweight, soft, and breathable. The increased weather resistance and durable construction means these fabrics are ideal for use in cold or damp environments where keeping warm and dry is crucial.