When the forecast looks iffy, we stash the lightweight PEARL iZUMi Attack Barrier Jacket in our jersey pocket in case of a sudden storm. The Barrier ripstop fabric is extremely lightweight and offers superior wind and water protection, and features a two-way zipper to provide ventilation if we start to heat up. When the cloud coverage brings low-light riding conditions, we trust in the BioViz reflective elements to help keep us seen.