Castelli Climber's A/C Cap

Lightweight Coverage for the Hottest Rides

When the temps soar, the Castelli Climber’s A/C Cap keeps your head cool and protected without weighing you down. Designed to fit perfectly under a helmet, this ultralight cap is your go-to for summer rides when breathability is everything.

Open-cell mesh fabric for maximum airflow and quick drying

Lightweight construction that disappears under your helmet

Classic cap style with a cycling-specific fit

Sweat-wicking performance keeps moisture out of your eyes

Whether you're climbing switchbacks or cruising through summer heat, the Climber’s A/C Cap helps you stay focused, cool, and covered.

Fit: One size fits most
Style Tip: Flip the brim up or down—your call.