Castelli RoS Cycling Cap - SS19
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Castelli RoS Cycling Cap - SS19Castelli RoS Cycling Cap - SS19Castelli RoS Cycling Cap - SS19Castelli RoS Cycling Cap - SS19
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Code: CS1853500
Castelli RoS Cycling Cap - SS19

Excelling in dry weather, but with extra protection when it turns wet, the Castelli ROS Cycling Cap brings the classic cap bang up to date. 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.


  • 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

Sizing Information for Castelli Clothing:

Castelli Size Charts

Michael Great under helmet cap for keeping the cold out
Mr Dow Great cap, for under my helmet,, keeps rain off my head, being bald, and peak keeps it off glasses
James light weight, fits comfortably under helmet, only worn in spring/summer , so far so good.
Sam Rain or shine indeed. Amazing cap, nice and breezy with the flap up and mesh out.
Eugen Euu Simply love it. Bald people like myself will fall in love with it!