Wind protection on gusty spring rides shouldn't have to ad weight to your kit, and Castelli aims to mitigate the weight penalties with the Perfetto Light RoS Jersey. This jersey takes the mark as Castelli's lightest short-sleeve jersey with wind protection ever, thanks in part to its featherweight GORE-TEX Infinium 203 Stretch panels that make up the bulk of the core, and the sleeves. This lightweight fabric acts as a barrier against wind and all-but the nastiest of downpours, while still maintaining GORE-TEX's signature breathability through it all. On the back, Castelli employs its Nano Flex Light Woven fabric that ads extra breathability and stretch, all the while providing coverage from wheel spray and showers.