Baleno Kalap HatBaleno Kalap Hat Flexothane Kalap lightweight rain hat, features 2 ventilation holes and a stretchable brim. The Flexothane does not allow wind to pass through the membrane as the gaps between the threads are too small for air to pass through at a certain speed. The specially designed material allows body heat and perspiration from the head to escape keeping you cool and your temperature regulated. To see more from Baleno, visit the Baleno Collection