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.