The castelli squadra long jacket is an ultra lightweight jacket designed so you can take with you riding and quickly put it on if you get caught in an unexpected shower this minimalist shell jacket has been constructed from a 100 polyester fabric which is completely windproof and has been coated for moderate water resistance this castelli jacket will easily pack away into a saddle bag or maybe even your jersey pocket making it an essential piece of clothing on every ride there is a rear ven