Mother Nature's varying conditions often call for an extra layer when a jersey won't keep the drizzle away, but a full jacket is overkill, Castelli's Women's Velo Vest steps in. It's a lightweight, breathable alternative that easily packs in a pocket. Castelli's Forcefield fabric is used throughout the Velo not only for its low weight, but its windproof and water resistant traits, too. It's a 30 gram, ripstop fabric with a DWR Durable Water Repellent coating, so it retains the fabric's natural breathability. Airflow is enhanced further by mesh panels that help ventilate the core. The Velo Vest is cut with a longer back to block wheel spray. And it's held in position with a wide silicone gripper to prevent upward migration. A high collar keeps light rain from running down the neck, and it turns into a stuff pocket for the vest. When packed away, the Velo only takes up half a jersey pocket. For low light safety, Castelli added a reflective logo and back tabs. The Women's Velo Vest comes in five sizes, X Small through X Large, and in the colors Orange Fluo, Lime, and Black.