Before the release of the Arizona, Birkenstock was a little-known German shoemaker with roots going all the way back to the 18th century. But when guys in the ’70s started giving Birks a shot, their comfortable-as-hell footwear became hard to keep in stock worldwide. These are the iconic staples of Birkenstock's lineup, complete with the classic two-strap design and contoured footbed that perfectly conforms to your feet as you rack up the miles.