Birkenstock are renowned for long-lasting comfort footwear, and these Arizona sandals are designed in their classic 2-strap style. With adjustable Birko Flor straps, a shaped cork and latex footbed and shock-absorbing EVA sole, they're the perfect choice to see your feet happily through summer. Birkenstock created Birko Flor as an alternative material to leather. It's made of soft acrylic and polyamide felt fibres with a durable, smooth leather-like finish. Birkenstock created Birko Flor as an alternative material to leather. It's made of soft acrylic and polyamide felt fibres with a durable, smooth leather-like finish.