Klymit NobleTek Gas Insulation

Cold-weather apparel made with Klymit NobleTek is simultaneously ultralight and hyper-efficient, thanks to chambers that keep the body warm in the same way double-paned windows insulate a building. A layer of argon has the same thermal conductivity as a layer of down or synthetic fiber insulation three times as thick, and unlike those materials, it’s unaffected by wetness or compression. The wearer can adjust the warmth level on the go by connecting a thumb-sized argon canister to a valve in the pocket, filling the 15-millimeter chambers for more heat or releasing the gas to cool down. And because argon is nearly weightless, Klymit’s 10.5-ounce Double Diamond four-way stretch vest boasts the highest warmth-to-weight ratio on the market, keeping you both warm and mobile on the slopes.
From $200; klymit.com