Rab's Ascent Jacket combines a water resistant Pertex Quantum Pro outer with hydrophobic duck down insulation, keeping you warm whilst maintaining its loft even if it gets damp. Cut to Rab's 'regular fit', it leaves room for multiple layers underneath if you're in extremely cold conditions, yet it's also very effective when worn over just a baselayer tee. The stitch-through baffle construction ensures that the moisture-repelling down insulation doesn't spread or bunch, preventing 'cold spots' from forming. Pertex Quantum Pro outer fabric Pertex Quantum inner 650FP R.D.S. Certified European Duck Down (275g/10oz in size 12) Rab fluorocarbon free Hydrophobic down developed in conjunction with Nikwax Stitch-through construction Helmet compatible down filled hood with flexible polymer peak Separate down filled collar with tricot lining 2-way YKK VISLON front zip, internal insulated zip baffle, chin guard 2 YKK VISLON zipped tricot lined h&-warmer pockets 1 YKK zipped internal security pocket Anti-snag hook & loop adjustable cuffs, hem drawcord Stuff sack for easy packing & carrying Developed in conjunction with Nikwax, Rab's fluorocarbon free Hydrophobic Down dries fast, retains its loft & absorbs less water than traditional down. The Durable Water Repellent (DWR) finish on each individual down filament protects from perspiration, condensation & precipitation & maintains loft & insulation in cold, damp conditions. Nikwax Hydrophobic Down filled items give increased performance compared to conventional untreated down in equivalent conditions, & continue to be effective in conditions where conventional untreated down filled items fail. If you're regularly outside in cold conditions, you'll benefit from the lightweight insulation & water resistance of Nikwax Hydrophobic Down.