The Argon Pants are filled with the highest quality 800FP down. Designed to be worn over a baselayer, the Argon offers extra comfort and warmth around basecamp, in a bivi or to increase your sleeping bag's performance. They pack down nice and small, making it a no brainer to carry them with you on your expedition, providing you with a boost of warmth when you need it most. Technical features include a tough and durable Pertex® Quantum outer, stitch-through construction to eliminate cold spots and a two-way front fly zipper. Fit:Regular Insulation:800FP European Goose Down with Nikwax Fluorocarbon-Free Hydrophobic Finish (160g/ 5.6oz, Size L) Weight:375g/ 13.2oz Inner Fabric:Fabric Inner - Pertex® Quantum:,DWR 80/20,0.3cc ,38g/m²,20d/20d,100% nylon Outer Fabric:Fabric Outer - Pertex® Quantum:,DWR 80/20,2CFM,50g/m²,20d/20d,100% nylon 6 Product Code:QDA-71 Rab® Fluorocarbon free Hydrophobic Down developed in conjunction with Nikwax® Stitch-through midi-baffles Belted waistband (removable) with snap closure YKK® VISLON® 2-way front fly zip with 2 insulated zip baffles Elasticated stretch hem