Mountain Warehouse GUST II Womens Jacket Waterproof  A waterproof membrane prevents water from leaking through the fabric Breathable  The highly breathable membrane lets moisture out, making sure you stay dry on the inside Fully Taped Seams  Fully taped seams make this garment completely watertight Double Storm Flap  Prevents wind or rain penetrating the zip by covering the zip mechanism Rain Channel  Grooved fabric channels divert water away from the zip