This midlayer has an OSM Shield, which among other things means that it is water-repellent.

This sporty midlayer is made with an OSM shield that adds extra value to the blouse by keeping the player dry and comfortable on the court, even if a "shower" -like rain should suddenly occur. This new treatment is odor and stain repellent and has moisture-transporting properties, which means that you stay dry and comfortable at all times. It allows you to enjoy physical activity and maintain the optimal body temperature. The stretch material in the fabric provides optimal freedom of movement and excellent comfort. Furthermore, the midlayer has a zipper pocket on the right chest.

If you want to know more about OSM shield, click here