Zipper closure 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. 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 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. A soft chin guard at the top of the zipper helps prevent chaffing and tender skin from getting caught, too. The form-fitting silhouette features a DWR coating to resist damp conditions and grime, while a perforated back panel helps to optimize temperature and moisture management inside. Genuine 3M Reflective logos and highlights add visual pop to enhance visibility in low light conditions.