With the women's Trasparente full-zip long-sleeve jersey, you can count on having all the necessary coverage from the wind and cold while still feeling sleek and elegant. Castelli use the X-Lite stretch Windstopper® fabric for the front panels and forearms and over the tops of the shoulders. This specific placement makes the jersey effectively wind resistant without inhibiting your freedom of movement. And since X-Lite has more than 10 times the breathability of other wind-protection fabrics, the Trasparente works to keep your perspiration from building up and cooling you off. While Castelli call this product a jersey, you'll find it protects almost like a jacket in cool conditions but still feels light and comfortable like a jersey.