Castelli Thermal Cycling Vest The Castelli Thermal Vest provides the perfect balance of warmth, breathability and versatility for cool weather riding. Designed to keep your core protected from cold air while allowing excellent ventilation, it’s an essential layer for autumn, spring and mild winter rides. The thermal fabric construction traps warmth while remaining highly breathable, helping regulate body temperature during both hard efforts and long steady rides. Key Features Thermal insulated cycling vest designed for cool conditions Breathable fabric helping regulate temperature during intense riding Wind-resistant front panel protecting the core from cold air Lightweight construction offering warmth without bulk Full-length front zipper allowing adjustable ventilation Elastic waist gripper keeping the vest securely in place Three rear pockets for storing ride essentials Versatile layer for training rides and variable weather The Thermal Vest is a versatile layer that works perfectly over a jersey or base layer when temperatures drop but a full jacket would be too warm. From the World Tour to your door.