The stretch nylon is feather light and extremely packable and moves with you it has an athletic fit allowing room for cargo in your jersey pockets giro also integrate mesh ventilation so it protects while still breathing and ensuring your heat can escape for brisk morning rides or days when the wind chill hits grab the womens chrono wind jacket and keep riding the chrono collectionthe chrono collection provides the foundation you need to go farther and faster on the bike cutting edge f