Featuring our Thermoregulation technology, the 2-way stretch fabric is highly breathable for optimum comfort. In hot weather, the Aerotech cap quickly wicks away moisture to keep your head dry. Laser perforations on the panels at the front of the cap allow for air circulation. With an ergonomic visor, the Aerotech cap provides effective protection for the face and eyes in sunny weather. The circumference can be adjusted to fit the size of your head using the tightening band. And because a major part of the design of our products is environmental responsibility, the fabric is certified OEKO-TEX® Standard 100.