Castelli

Alpha 150 Jacket - Men's

What Our Gearhead® Experts Are Saying:

"This is my top pick for cold-weather road rides. The Alpha’s dual-layer system lets me dump heat fast without compromising warmth. It also has the best fit of any winter jacket I’ve tried, and the articulated collar means no annoying bunching around my neck."

Castelli’s Alpha 150 Jacket redefines what we expect from a winter cycling layer. Its dual-layer design—combining a separate windproof outer and an insulating inner—lets us fine-tune ventilation on the fly. We can open the front zipper without sacrificing the warmth of the inner layer, which helps keep our core temperature dialed through shifting conditions and intensity levels.

Windstopper® 150 fabric forms the jacket’s foundation, offering windproof and water-resistant protection that’s also surprisingly flexible, adapting to our movements on the bike. Castelli’s careful patterning ensures a close, aerodynamic fit that doesn’t restrict. Raw-edge wrist cuffs integrate seamlessly with our gloves, while the articulated collar fits snugly and comfortably no matter how deep we’re tucked in.

Finished with thoughtful storage solutions—three roomy rear pockets and a zippered pocket with reflective details—the Alpha 150 Jacket keeps us well-supplied for winter miles. Whether we’re logging base miles in the cold or pushing the pace on a winter climb, the Alpha Jacket is ready to keep us warm, dry, and performing at our best.