This Bomber Hat is made with the top quality Australian Sheepskin which has been leathered to handle varying weather conditions. The Bomber Leather provides protection against dirt and moisture. Sporting the traditional side flaps to warm your ears and secured with a velcro strap. These hats can be worn with the flaps up or down to suit your style and comfort needs. Small is 54 cm, Medium is 60 cm, Large is 66 cm.