The most advanced waterproof MTB jacket Featuring the world's most breathable waterproof fabric, Polartec Neoshell, the Flexair Neoshell Water Jacket combines the ultimate in weather resistance with the ultimate in breathability. Not only does it protect you from a nasty downpour, but it also enhances natural thermoregulation to release heat and perspiration from inside the jacket, keeping you dry. With its helmet-compatible hood, waterproof pockets, and element-busting adjustment features to make the fit even more secure, this is the perfect jacket for when the weather takes a turn on the trail.