London Underground Mind The Gap Red Baseball Cap Hat Adjustable TfL Souvenir London Underground Mind The Gap red baseball cap. This souvenir hat features the iconic roundel logo with high-quality embroidery on the front. Constructed from durable polyester twill with a classic six-panel design and breathable eyelets. The back includes an adjustable strap with a metal slider for a customized fit. Official Transport for London (TfL) licensed merchandise by Blues. #Sporty #Unisex