The Castelli Alpha Flight RoS Jacket is a premium-level cycling shell engineered to deliver unmatched protection in miserable weather conditions. Designed for riders who refuse to let rain, wind, or cold disrupt their training or adventures, this jacket blends Castelli’s most advanced waterproof materials with thoughtful cycling-specific design. The result is a high-performance outer layer that keeps you dry, comfortable, and confident when the skies open and conditions turn foul.

At the heart of the Alpha Flight RoS Jacket is Castelli’s innovative waterproof, breathable fabric that blocks driving rain and strong winds while allowing moisture vapor to escape. Seams are fully sealed, and critical areas are reinforced to ensure watertight performance without excessive bulk. The articulated cycling fit follows your riding posture, minimizing drag and flapping at speed, while stretch panels in high-movement zones maintain natural mobility and comfort throughout the ride.

Functionality is key in challenging conditions, and this jacket delivers. A waterproof, full-length zipper provides secure closure and ventilation control, while a protective storm flap and bonded zipper backing help block water infiltration. The hood is helmet-compatible and adjustable, allowing you to dial in coverage without compromising visibility. Rear pockets are sealed or water-resistant to keep essentials secure and dry, and reflective details enhance visibility when rain and low light reduce contrast on the road.... Read More