Chrono Wind is our packable ripstop fabric with 2-way stretch and a DWR coating that's engineered to slice through the wind without weighing you down. Reflective details enhance visibility at nighttime or in low-light conditions when illuminated by a light source, such as headlights, by returning the light back toward the original source and reaching the automobile driver's eye. The pack sack is built right into the garment, for fast, easy storage when needed. Perforated panels allow warm air inside the garment to escape, enhancing thermal regulation, moisture management and overall comfort as you ride. Durable Water Repellent (DWR) is a finish or coating added to Giro fabrics to make them water-resistant so they can shrug off rain, snow, and damp conditions. The Chrono Expert Wind Vest is a go-to barrier against wind and chill, and an ideal mid layer that pairs perfectly with a jacket when rain or colder temperatures demand it. The 2-way stretch wind-proof ripstop fabric packs down into a jersey pocket with ease and the form-fitting silhouette features a DWR coating to resist damp conditions and grime. A perforated back panel helps to optimize temperature and moisture management, while genuine 3M Reflective logos and highlights add visual pop in low light conditions.