The Castelli Sottile Jacket is made of a lightweight semitransparant material and folds up next to nothing. Designed as a great race piece due to its lightweight and the nature of the fabric allowing your race number and jersey to be visible. However its packability also makes it a great piece for training and sportives. Unlike race capes of old that were basically a hard plastic this Castelli version uses a light stretchy fabric with underarm mesh inserts to aid breathability and improve the fit and comfort. It has a high neck for added protection and evan a zip to access your jersey pockets. The Castelli Sottile Due Jacket so much more than a race cape.