The perfect vest for cycling. With GORE-TEX INFINIUM WINDSTOPPER wind and weather protection on the front, a breathable, water-repellent back thanks to Nano technology and stretch fit. When not in use, it fits into a half jersey pocket. All this makes it a core piece of your cycling wardrobe. TECHNICAL SPECS - Best vest for racing or training with windproof front and breathable, water-repellent back - GORE-TEX INFINIUM WINDSTOPPER 203 stretch fabric on the front. - Nano Flex Light Woven at the back for breathability and good moisture protection - YKK Vislon 2-way zipper for easy ventilation control while riding - 3 back pockets - Reflective panel under the back pockets and around the armholes The Perfetto RoS 2 Vest is our approach to creating the perfect vest. It's warm and windproof, yet breathable, thanks to Castelli-exclusive GORE-TEX INFINIUM WINDSTOPPER fabric on the front and Nano Flex Stretch Woven fabric on the back, with no membrane. It keeps splashing water out in wet roads or changing conditions. It is lightweight and packs down small, leaving room in a jersey pocket. It has three back pockets and a YKK Vislon 2-way zipper that, when opened from the bottom, provides access to the contents of your jersey pockets. Reflective trim on the armholes and reflective tape under the back pockets make it 360° visible. The fit is close to the body, with a high collar that feels extremely comfortable in cooler temperatures.