Castelli Emergency 3 Rain Jacket When the Sky Opens Up, Stay on the Bike The Deluge 3-layer fabric at the core of this jacket earns its name. A 20, 000mm water column rating backed by fully taped seams and a waterproof zipper means rain stays outside, where it belongs. The knit polyester inner layer sits directly against skin without the clammy feel common to cheaper shells, and the fabric's built-in stretch moves with you through the full range of a riding position without binding. When a forecast goes sideways mid-ride, this is the jacket that fits in a jersey pocket until you need it, then performs well enough to carry you through a full day of wet-weather riding. 3-Layer Deluge Fabric: 20, 000mm waterproof rating with a thin, light construction keeps weight and packed size down without sacrificing protection Fully Taped Seams + Waterproof Zipper: seal every potential entry point so rain and wind stay out across hours of riding, not just the first few minutes Knit Polyester Inner Layer: sits comfortably against skin with no liner needed, so you can pull this over a jersey and get moving fast Performance Stretch Fit: close to the body but not restrictive, with enough give that the jacket stays put and doesn't ride up on the bike Highly Packable Design: compresses small enough to stow in a jersey pocket or bikepacking bag, so it's always on the ride without taking up real estate360-Degree Reflectivity: keeps you visible in low-light and wet conditions when contrast is low and drivers have rain on their windshields | Castelli | Emergency 3 Rain Jacket Men's | Size Medium In White | Polyester