BIRKENSTOCK. 53011. FLORIDA BIRKO-FLOR SOFT FOOT BED. BLACK.The BIRKENSTOCK Florida is the ideal sandal for anyone who spends a lot of time on their feet and sets great store by comfort above and beyond the norm. The anatomically formed original BIRKENSTOCK cork-latex soft footbed with built-in permanently elastic latex cushion ensures outstanding comfort that starts on day one. The upper is made of skin-friendly hard-wearing Birko-Flor.