Imprevisto womens short sleeve jersey an extra level of moisture management the imprevisto is the first jersey that brings castellis nano water repellent finish to a fully breathable jersey fabric in dry conditions you have all the air flow and wicking of your favorite jersey but if you get caught in some light rain or spray from wet roads the nano finish repels water to keep you dry we dont claim that its waterproof as there is no membrane but it will give an extra layer of comfort in va