RoS Rain or Shine products are made to be your favorite garments for dry weather, yet provide significant water protection. We made this jersey 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.