The Rab Men's Infinity Endurance Down Jacket provides lofty warmth whether you're making an ascent on a snow capped mountain, belaying your friend on a freezing ledge, or just chilling around a campfire at night. This jacket's Pertex Quantum GL fabric helps keep it super light, and its Pertex Endurance coating makes the Infinity Endurance windproof, breathable, and highly water resistant. Insulated with 210 grams of 850 fill power, hydrophobic European goose down, this jacket is extremely lofty, very warm, and extremely light for the heat it produces. The Infinity Endurance has a huge hood that you can adjust to cinch down tight over your head when it's windy, or you can loosen it up to make room for a climbing helmet. It also has a wire brim to give the hood nice and sturdy protection from sunlight and falling debris. This jacket has elasticize cuffs and 2 drawcords at both sides of the hem so you can prevent any unwanted winds from blowing up in it. Rab included a stuff sack for this highly compressible jacket so you can take it with you anywhere whether you're concerned about space or not.