Castelli Alpha 150 Jacket The Castelli Alpha 150 Jacket is the 'no excuses' winter cycling jacket. Get out and ride no matter what. Twelve years of continual refinement have led to a winter jacket utilising the very best performance fabrics and innovative construction techniques that deal impressively with a wide range of conditions, both cold and wet. The power of Polartec® It all starts with the Castelli exclusive 150g Polartec® AirCore™ electrospun air-permeable membrane - windproof, waterproof and yet incredibly breathable, this performance garment technology ensures rain doesn't get in...