The LTM6IS AIRFLO® Tilley Hat is a fusion of broad brim styling, Insect Shield® technology and a lightweight neck protector. Insect Shield® technology helps protect from biting insects while the neck protector unrolls discreetly from the rear brim to shade all angles of the neck. Designed with a 3/4" polyester mesh built into the crown, this lightweight Hat offers superb ventilation and is made from Tilley Nylamtium®, a strong water-and-mildew resistant form of nylon.