Not every cyclist enjoys the hardships of winter cycling, preferring instead to end the outdoor riding when the temperatures get within 10 degrees Fahrenheit of freezing. Castelli understands the reasoning behind that decision, as evidenced by the Mortirolo 3 Jacket. The Mortirolo 3 is similar in design to its more expensive, more insulating siblings, the Espresso 3 and Senza jackets, but it's just built to handle slightly warmer conditions, so it will keep you comfortable through late fall until the dead of winter. Castelli recommends it for 43 to 59 degrees Fahrenheit, but sizing up allows you to fit a base layer underneath it to extend its range into the high 30s. The front of the Mortirolo 3 is the same Windstopper X Fast material you'll find on some of the brand's more expensive jackets. Castelli sources from the venerable manufacturer Gore Tex. Since it has a windproof rating of less than or equal to 1. 0 CFM, Windstopper X Fast is literally windproof. It also has a DWR treatment to protect against mid ride precipitation or road spray and a lofted, fleecy lining to insulate and provide next to skin comfort. Since it's made for warmer conditions, the Mortirolo's back eschews Windstopper fabric in favor of the more breathable Warmer material. Warmer has a soft, brushed interior that insulates as well as the Windstopper front but ventilates better to keep you from overheating. The jacket's construction is rounded off with the same zippered chest vents found on the Espresso 3 and the silicone waist gripper of the Senza. It also has a full length front zipper, three rear pockets, and reflective tabs to help keep you visible in low light conditions. The Castelli Mortirolo 3 Jacket is available in sizes ranging from Small to XXX Large in the colors Anthraciteblackyellow fluo, Black, Moonlight Blueredblack, and Redwhiteblack.