Sporting a 3-inch wider chest than its predecessors, Mountain Hardwear's Alchemy Jacket blends WindStopper and Power Shield fabrics to create a superior soft-shell outer layer for unsavory conditions.Features: Gore Trango WindStopper body provides windproof, water-resistant protection while the non-restrictive, Polartec Power Shield side stretch panels deliver enhanced breathability and 4-way stretch. Non-restrictive stretch panels allow for full-span movement, the athletic fit allows for light shell layering and the barrier membrane protects alpinists from getting the chills. One-hand adjustable neck and bottom hem drawcords combined with Polartec Power Stretch cuffs seal out both liquid and frozen elements. Welded zippered chest pocket and two zip hand pockets provide secure storage. Specifications: Weight: 1 lb 8 oz. Fabric: Polyester - nylon. Laminate: Gore Windstopper. Specifications based on size Large.