Shape: Features a low-profile rounded crown, pillbox style, or French-inspired beret look with a subtle or downturned brim.Materials: Commonly made from lightweight, breathable polyester blends, wool felt, or cotton fabric for a soft and comfortable fit.Details: Often includes minimal ornamentation, such as thin piping, a small embroidered emblem, a side badge, or an airline logo/insignia.Fit: Designed with a standard circumference of about 22 to 23 inches (56 to 58 cm) to sit securely on the head.