James C.wrote a review of Castelli Alpha RoS Light Jacket - Men's on October 21, 2019
Familiarity: I've used it several times
great jacket for the cooler wet days. I use this into the high 30's low 40's +/- a base layer. runs a size small. on the really cold days I use the regular alpha ROS jacket with the insulation. both are nice pieces of gear and both run small! by comparison I wear a L in rapha and a medium in the showers pass gear. this is a euro cut for sure.