Made to be the perfect vest. Gore-tex infinium™ windstopper® wind and water protection on the front, and a breathable nanotechnology water-repellent back. The Perfetto RoS 2 Vest is our attempt at the perfect vest. It´s warm and windproof yet breathable thanks to the Castelli-exclusive GORE-TEX INFINIUM™ WINDSTOPPER® fabric on the front and the membrane-free Nano Flex stretch woven back fabric. It´s splash resistant for wet roads or changing conditions. It´s light and packable, easily fitting in a jersey pocket with room to spare. It has three rear pockets of its own and a two-way YKK® Vislon® zipper you can open it from the bottom to access gear in your jersey pockets. It has 360° reflectivity thanks to the reflective trim on the armholes and reflective band below the pockets. It fits close to body with a high collar that feels oh-so-comfy for cooler conditions. This is the same model used by the Soudal Quick-Step team.Features:- Best race or training vest with windproof front and breathable rain-repelling back- Gore-tex infinium™ windstopper® 203 stretch lightweight fabric on front- 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 pockets and around armholesSpecifications:- Weight: 219 g- Temperature: 18°C - 38°C / 64°F - 100°F- Fit: RaceTechnical Features: - Breathability: 4/5- Lightness: 4/5- Insulation: 2/5- Waterproofness: 3/5- Windproofness: 4/5Technology:Rosso Corsa:- 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.Gore-tex infinium™ windstopper®: - Gore-Tex® garments provide total wind protection and maximum breathability. The windproof membrane keeps you from getting cold due to windchill, but the optimum breathability prevents overheating and moisture accumulation by allowing sweat to escape easily. Water repellency is ensured by the DWR treatment applied to the outer fabric.RoS Rain or Shine:- We've engineered RoS as the no-compromise best clothing we know how to make for dry conditions, and then tried to make it as close to waterproof as possible without sacrificing breathability and ventilation.Nano Flex:- Exclusively engineered by Castelli. We take our thermal fleecy stretch Thermoflex fabric and coat it with millions of tiny nanofilaments to create the most water-repellent fabric finish ever. Drops of water stay as spherical balls on top of the fabric or bounce off the fabric without leaving a trace.