If you're heading for the likes of the Himalaya, the Positron Pro is a down-filled jacket with zoned construction to optimise warmth and mobility whilst minimising bulk, so you can endure prolonged exposure to very cold conditions.Designed for mountain and expedition use up to 6000m, the Positron Pro Jacket uses a Pertex® Quantum Pro shell to provide protection from the weather and is filled with the highest quality 800FP down. Boxwall construction on the torso, hood and upper arms provides extra insulation on more exposed areas. Stitch-through construction on the underarms and side panels allows for 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 Positron Pro is optimised to offer the perfect balance of mobility, comfort and protection in very cold conditions.Details Fit: Regular Insulation: 800FP European Goose Down with Nikwax Fluorocarbon-Free Hydrophobic Finish (300g/ 10.6oz, Size L) Centre back length: (Size L) 83cm/32.75inch Weight: 760g / 27oz Inner Fabric: Fabric Inner - Pertex® Quantum:,DWR 80/20 ,0.3cc ,38g/m² ,20d/20d ,100% Nylon Outer Fabric: Fabric Outer - Pertex® Quantum Pro:,1000mm ,DWR 80/20 ,40g/m² ,100% nylon with Polyurethane coating Pertex® Quantum Pro outer fabric Pertex® Quantum lining 800FP European Goose Down with Nikwax Fluorocarbon-Free Hydrophobic Finish (300g/ 10.6oz, Size L) Rab® Fluorocarbon free Hydrophobic Down developed in conjunction with Nikwax® Boxwall construction on torso, hood and upper of arms Stitch-through construction on underarms and side panels Helmet compatible down filled hood with wired peak and face baffle Concealed hood adjusters 2-way YKK® VISLON® front zip with synthetic insulated baffle behind YKK® coil zipped chest pocket with synthetic insulation overlay 2 YKK® VISLON® zipped hand pockets Reflective prints for safety Hook and loop adjustable cuff tabs Hem drawcord