With just a base layer, it´s a wind-protection jersey for mild conditions. Alternatively, use it over a jersey like a vest with added protection on your shoulders. Lightweight, breathable front wind protection with allover water repellency.Product features:- Lightest Castelli short-sleeve wind protection- GORE-TEX INFINIUM™ WINDSTOPPER® 203 Stretch lightweight fabric on front and sleeves- Nano Flex Light Woven on back for breathable stretch with good water protection- Top- and bottom-opening YKK® Vislon® zipper for easy ventilation adjustment on the fly- 3 rear pockets- Reflective panel at bottom of pocketsSpecifications:- Weight: 191 g- Fit: Performance Technologies:Our Rosso:- Our Rosso Corsa label is only applied to the highest-level products we make. Every thread and fiber, every curve and contour is obsessed about. Rosso Corsa represents a categorical breakthrough in cycling innovation and the meticulous craftsmanship you expect from Castelli's performance-enhancing apparel.