The shiny, bright-colored outer fabric of this jacket doesn't just look high-tech; it is none other than the fabled Pertex Quantum fabric.This nylon weave is featherweight and has an incredibly high strength-to-weight ratio. It is also completely windproof, impenetrable by down, and treated with a DWR coating for water repellancy. The lining of this jacket is also made with down-proof nylon, so you won't have any feathers poking out from the outside or the inside. Speaking of feathers, the 750-fill down found in the Vulcan Jacket is treated with a water-repellant and anti-bacterial Downtek coating to keep you warm and smelling good, even when wet. Throw your stuff in the chest and hand pockets and go on your way—you've never been this warm and comfortable out in the backcountry.