Senza translates to without, a theme that Castelli really ran with while designing the Senza Jacket. Being called Senza doesn't mean that it's featureless, though. It combines cold weather protection and a functional storage capacity in a race fit jacket the without theme refers to its lack of extraneous frills. It's a simple, effective way to enjoy the legendary function and styling of a Castelli jacket without any unnecessary embellishments. The Senza is made from Windstopper X Fast material from the venerable manufacturer Gore Tex, which is the go to destination for manufacturers who want to beat the wind. Wind resistance is expressed in terms of CFM, which determines permeability by measuring the volume of air that can pass through a given material in one minute. Since all fabrics branded with the Windstopper stop sign logo either beat or exceed the windproof rating of 1. 0 CFM, they are all literally windproof. This windproof layer is sandwiched between a protective outer layer, which has been given a DWR treatment for water resistance, and a fleecy, insulating lining. The jacket features Castelli's bike specific fit, which may feel awkward and restrictive while you're on foot, but which conforms to your chest, stomach, and arms while allowing your shoulders to reach forward while you're in the saddle. Its aesthetic design is Castelli at its finest: large panels of solid colors with subtly understated contrasting details. Castelli recommends the Senza for temperatures between 32 and 50 degrees Fahrenheit. It has a flip up thermal collar for extreme conditions or when you don't want to catch a chill on your neck, a zippered chest pocket, and a zippered rear pocket with reflective webbing. It also has the standard cycling top inclusions: a full length front zipper, three open rear pockets, and a microfiber grip on the hem to keep the jacket where it's supposed to be. The Castelli Senza Jacket is available in six sizes ranging from Small to XXX Large ...