Castelli's best jacket for mild conditions, with front wind protection, light insulation, maximum breathability, and water repellency to keep you dry in mist, light rain, or spray from wet roads. This is a Castelli staff favorite thanks to the wide temperature range, fit, and versatility.

The wind protection comes from our GORE-TEX INFINIUM™ WINDSTOPPER® 150 lightweight two-way-stretch fabric that moves with you while being so light you'll hardly notice it's there. This light wind layer is backed by a separate inner layer with a separate zip that can be opened independently for perfect ventilation control.

With both inner and outer layers having zips, you can easily adapt the ventilation to regulate your body temperature depending on the weather and your riding intensity level.

The back of the jacket is made with Nano Flex Xtra Dry fabric with a nanotechnology water-repellent finish for ventilation and protection from rain and road spray.

It may be called a jacket, but it’s so much more. It’s made for your more intense rides in changeable weather or cool days of steady miles. The Alpha RoS 2 Light Jacket strikes just the right balance to keep you dry and comfy all ride.