The Copper GTX is everything you need and nothing you don't in a classic alpine style that will perform season after season. Featuring stretch GORE-TEX, PrimaLoft Black ECO Insulation and watertight AquaGuard zippers, nothing was sacrificed on the design or construction of this all-mountain jacket. Interior stretch panels increase comfort and mobility and underarm vents, removable hood and adjustable cuffs with interior thumb holes make micro-adjustments easy for a customized climate and fit.