The Argon Pants are filled with the highest quality 800FP RDS Certified European Goose 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, and the provided stuff sack makes 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® Microlight outer, stitch through construction to eliminate cold spots and a 2-way front fly zipper. Pertex® Microlight outer fabric R.D.S. Certified European Goose Down (160g/ 5.6oz size L) Rab® fluorocarbon free Nikwax® Hydrophobic Down Stitch through midi channels Belted waistband (removable) with snap closure YKK® VISLON® 2-way front fly zip with 2 insulated zip baffles Elasticated stretch hem Stuff sack Designed to be worn over a baselayer pant Weight 375g (13.2oz) Size & Fit Fit: Regular Materials Fabri