This cap creates a remarkable barrier from the rain. Exclusive eVent(R) ultralight fabric keeps all the rain out but also keeps a lot of heat in, which makes a big difference when you're riding on colder rainy days. Top Features of the Castelli Tempesta Cap Exclusive ultralightweight 70 g eVent(R) fabric Traditional cycling cap cut with flip-up visor Neck flap to prevent water running into your jacket Completely waterproof with taped seams Reflective trim on back Fits under helmet Recommended for colder conditions or moderate-intensity riding 28g (Size Large) Product Data Waterproof: Yes High Visibility: No Road: Yes eVent waterproof fabric keeps you dry in wet riding conditions. It's waterproof outside while allowing perspiration to escape from the insidethrough millions of tiny pores. In fact, eVent is 30% more breathable than it's closest competitor. eVent is the smartest choice for athletes who need and demand the highest possible performance and comfort from their gear.