The Castelli Pro Issue Short Sleeve Base Layer was created after requests from Castelli's pro riders, who wanted a highly wicking base layer to keep them dry and comfortable in those in-between conditions where the Flanders is too warm and the Core Mesh is too cool.
The main aims of this base layer are to move the moisture away from your body and to encourage air circulation and heat removal, to help your race jersey perform when you're putting in intense effort on your ride or the day is hot.
Castelli's 3D mesh fabric creates air space next to your skin, while the polyester capillary action moves sweat away.