Castelli

Alpha 150 Jacket - Women's

What Our Gearhead® Experts Are Saying:

"I always reach for the Alpha 150 Jacket when winter tries to stop my rides. The separate layers work so well to regulate heat, and I love how the outer shell zips open without letting the cold blast straight through. It’s a brilliant design for long, variable-weather days."

Castelli’s Alpha 150 Jacket blends race-inspired fit with cutting-edge performance to make winter rides not just bearable, but enjoyable. The dual-layer system is the star, allowing the outer windproof panel to vent while the inner insulation keeps our core protected. This lets us fine-tune comfort as the weather shifts or the road pitches up.

Windstopper® 150 fabric ensures a wind-blocking shield that doesn’t hamper movement. Thanks to Castelli’s advanced patterning and stretchy fabrics, the fit stays aerodynamic and comfortable—even when layered over a thermal base. Raw-edge cuffs at the wrists integrate smoothly with our gloves, and the articulated collar sits snugly no matter how low we’re tucked.

Three generous rear pockets and a zippered security pocket keep our fuel and gear close at hand, while reflective details boost visibility in fading light. Whether we’re hammering out winter miles or spinning easy to stay sharp, the Alpha Jacket helps us thrive in the cold, mile after mile.