Material: Polyester; Item Type: Baseball Caps Adjustable 55 - 60cm perimeter, fits for most adult. Vintage Red Star style Red Army hat This cap super lightweight. It is suitable for regular daily use and outdoor activities especially like bush walking, fishing,running,hitch-hike travel, outdoor research,baseball,cycling. Baseball hat provides sun protection for your head and face, and the sweatband makes you comfortable and breathable in hot days.