Maximum, expedition-level warmth is what the Rongbuk is all about. Made with negative temperatures, strong winds, and frigid cold in mind, it has premium 750-fill European goose down insulation and a shell made of ultralight but tough Pertex Quantum nylon. Down is the best choice when you require lightweight, lofty, compressible warmth and you know there is no rain in the forecast. Weighing in at just around 20 ounces, it has an incredible warmth-to-weight ratio and is about the dreamiest stuff to immerse yourself in when conditions are serious. Baffled construction helps trap and hold heat, while the windproof, water-resistant, downproof shell keeps feathers in and weather out. The hood is compatible with climbing helmets and is adjusted through the chest pockets: a system that keeps excess drawcords away from the face. Interior mesh pockets are perfect for thawing water bottles with your body heat.
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