Castelli's RoS (Rain or Shine) products are made to be your favorite garments for dry weather, yet provide significant water protection.
This jersey is made with a double-layer fabric that keeps more wind out than your traditional jersey, yet has no membrane so still has some airflow to maximize breathability. Hence the Nelmezzo name – Italian for in the middle.
The tighter weave and new Nano Flex Xtra Dry make this all but waterproof: you can wear it by itself on wet roads or in light rain/mist, although in steady rain you will likely still reach for a rain shell.
Nano Flex Xtra Dry low-air-permeability water-repellent dual-face knit fabric
Warmer than a normal thermal jersey but more breathable than a windproof jacket
Double-face fabric with polyester inside and nylon outside for excellent moisture transfer
Easy-sliding YKK® Vislon® zipper
3 rear pockets plus covered key pocket
Reflective arm bands and back panel
10°-18°C / 50°-64°F