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Castelli RoS Cycling Cap - SS19 is no longer available at Merlin Cycles. However you may find an alternative or updated product below.
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

This item was discontinued 2nd November 2020.

If you require help finding an alternative to this product please contact customer services.

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
Hugh Mysterious. Draws many envious comments. Warm.
Mr PeterC Good fit even for my big head. Ventilation works nice.
Mr MCLEESE Great cap. You can adjust this cap to let a bit more air through the front or to keep your head dry when it rains.
Gareth Dent Great lightweight waterproof cap. The front vent might be useful but not tested yet.
Mr Parizek Very handy piece of garmet. Fits well, in cold condition the front pannel can stay closed, when warm it can be open for ventilation.
Mr Hodgson Impressed. This will be my go to hat for rainy days in autumn and spring.
Mr McDowell Love this Cap especially folding front panel for ventilation when head gets bit warmer.
Angelo Great hat little tight
Mr Baxter Great for velo bald warriors.
Ronan Bought to stop my head getting sunburn. Was out for 4 hours in 26 degrees sunshine over the weekend and it did the job. Still keeps you cool and keeps the sweat from your eyes. Have yet to use it in the rain.
Mr Kaye Fab cap. Good fit no pinching. Light weight with the roll back front section allowing more air through the cap is a real bonus. Good cover in all weather.
Mr McCrae Theme from previous reviews is that it is great hat for bald men! As a bald man I agree, I can wear it under my helmet and it is light and comfortable. It can keep me dry and relatively warm on wet colder days (when the movable fabric is pulled forward) and will keep me cool and keep the bugs off my head on warm/dry days, when I pull the fabric back. A hat for a variable day of Scottish weather👍
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!