Castelli - Ros
The ROS Cycling Cap adaptability comes from a patented system that sees the windproof and water-repellent front fold back for incredible breathability or pulled forward for weather protection. In effect, you have three hats in one - with the panel folded back, a highly breathable cycling cap - worn peak to the back for a balance of breathability and protection - and fully closed for the worst of weather conditions.
The Pertex® fabric is also ridiculously thin to fit under a helmet, yet has enough air permeability to prevent you from wetting out as you would under a non-breathable cap. The humble cycling cap is now firmly in the 21st Century.