Mucros Wool Driving Cap Green Herringbone Plaid Made in Ireland Wool driving cap is crafted from 100% lambswool for a warm and durable cap. Features a quilted polyester lining for comfort. Dry clean only. Small (7) = 22 , Medium (7 ) = 23 , Large (7 ) = 24, and XL (8) = 25 . Made in Co. Kerry, Ireland by Mucros Weavers.