Off-Road Weather Protection. Come Rain or Shine. A jacket that does everything well, the Perfetto ROS Long Sleeve started life as a pro-rider garment created for cool-weather training and to take on extreme weather when racing. As part of the ROS (Rain or Shine) and Unlimited families, it loves to mix things up on or off-road and in any weather. It excels in cold dry weather but when the rain rolls through, water protection nearly matches that of a dedicated rain jacket. This versatile performance is made possible via two new GORE-TEX INFINIUM™ fabrics, exclusive to Castelli. Facing into the weather, the front is windproof and lightly fleeced INFINIUM™ 205. This prevents heat loss when temperatures plummet. To the back, INFINIUM™ 203 Stretch offers a snug fit and enhances breathability. When your ride intensity increases this prevents you being soaked in sweat and adds comfort once you back off the pace. With both fabrics offering excellent water resistance, you can ride for longer before having to pull on a hardshell jacket. The Perfetto ROS is also the perfect weight for multi-season layering - use a light base layer for milder conditions or add a thermal jersey underneath for more extreme cold. You decide. Details Honed With improvements to the fabrics, Castelli turned their attention to the other all-important details on the jersey. Getting at your pockets with winter gloves on is a frustrating experience and so Castelli has given the Perfetto ROS two larger rear pockets, making accessibility, even with gloves on, far easier. Inside, a pump sleeve keeps it secure, a dropped tail below the pockets enhances road spray protection and a large reflective panel boost your profile when daylight fades to darkness. Lastly, side vents are useful for increased airflow when you're putting in maximum effort or winding your way up a long climb. If there is just one item of clothing to see you through a winter of off-road and road cycling then the Perfetto Unlimited ROS Long Sleeve Jacket could be it. An investment in your comfort as you tap out those winter miles in anticipation of summer smiles.