The popular ‘Arizona’ mules from Birkenstock have been given an update this Season. As the name suggests, the ‘Big Buckle’ version features large and pin buckles â€“ an eye-catcher on the otherwise understated leather straps. This makes these mules an exceptionally classic model. Crafted from premium nubuck leather with an oiled finish that has been used for a natural look. Signature Birkenstock branding is seen throughout.