Castelli created the RoS Cycling Cap from a desire to make a cycling cap that's great in dry weather yet can protect in case of rain. The trick is a patented system in which the windproof, water-repellent front panel can fold back for complete breathability or fold forward to protect. Better yet, you have three ways to wear it: with the protective panel folded back, moderate breathability with the cap turned around backward, or fully closed. The Pertex® fabric is ridiculously thin to fit under the helmet, yet has enough air permeability to prevent you from wetting out as you would under a non-breathable cap.
- Rain or Shine product made to excel in both dry and wet conditions
- Patented convertible front panel can close for wet conditions and open for extra ventilation in warmer conditions
- Pertex® Quantum base fabric with low air permeability to let sweat escape, while the DWR coating keeps light rain at bay
- Extra thin and lightweight to fit under your helmet