Waterproof, breathable 3-layer jacket made from leightweight Dynashell material. When it rains, you can carry a backpack under cover - a zipper expansion on the back of the jacket provides enough space to carry an 18 - 20 liter pack. On the front of the jacket, two ventilation zippers provide a supply of cooling air on challenging uphill stretches. The hood is constructed to fit over a helmet, and is adjustable with one hand. Taped seams keep water out, while reflective accents provide better visibility in poor light conditions.