Standard Fit: Not too tight, not too loose. Standard-fitting apparel will fit without restricting movement. Stretchdown™ weaves pockets of down insulation from a single stretch fabric, giving you freedom to move. A durable material blend comes together with the highest quality goose down insulation in an ultra-engineered construction to combine warmth and movement for the full range of winter activities. From trailhead to summit, over bases or under a waterproof shell: this layer is made to mobilize.