From trailhead to summit, over baselayers or under a waterproof shell, Mountain Hardwear's Stretchdown Light Jacket is our favorite way to stay warm and mobile in the alpine. Stretchdown weaves pockets of down insulation from a single stretch fabric, giving us freedom to move. This durable material blend comes together with the highest quality down insulation in an ultra-engineered construction to combine warmth and movement for our full range of winter activities.