Castelli Emergency 2 W Rain JacketThe go to jacket for rain protection, whether for all day use or emergency use, since it easily stashes away in a jersey pocket. With discreet styling and 360 reflectivity, it can do double duty as a commute jacket. Deluge Light 2. 5 layer waterproof fabric keeps rain off with 10,000 mm water column Slight amount of stretch for excellent fit in riding position Folds into half a jersey pocket for emergency situations Stuff pocket integrated into mesh