Castelli Alpha 150 Rosso Corsa Windproof Jacket Black

The Castelli Alpha 150 Rosso Corsa windproof jacket is designed to keep you riding throughout the winter. It is the result of 12 years of continual refinement of a concept devised to keep you warm and dry, inside and out.

New for 2025, the Alpha 150 now uses Castelli’s exclusive Polartec Air Core fabric to deliver unrivalled breathability in a windproof and waterproof fabric. Inside, Polartec Alpha insulation provides warmth and reduces moisture.

The stretchy, close-to-body fit means you do not feel as if you are wearing a full winter jacket. This jacket is ideal for cold, dry days, but can handle everything except all-day heavy rain, in which case you will probably need a waterproof.