Castelli Size Chart Castelli has engineered an extremely high amount of protection into a minimum-sized package. Using a 30 g/m2 water-repellent and windproof fabric, they created a jacket that disappears into half a jersey pocket when not in use, yet provides wind and rain protection when needed. Fit is predictably Castelli: close to body to minimize flapping fabrics. Serious equipment for unpredictable conditions. Features: - Zip up front - 30 g/m2 water-repellent technology - Easily foldable - Close to body fit - Weight: 93g