The German-based Birkenstock family has been making footwear for over 230 years, so they're pretty much pros at this point. The "Arizona" is the groundbreaking classic style molds to your feet and is super-durable... and crazy comfortable. 

Price: $135.00
The Birkenstock "Arizona" flat sandal should be in the Hall of Fame of shoes. This sandal hasn't changed since the style's launch in 1974 when the brand became synonymous with the no-frills double buckle strapped flat. Made of acrylic and polyamide felt fibers, the unique footbed molds to your feet in a magical way. It's all made of a soft fabric with a smooth leather-like finish. Be a part of history and feel the sensation that made them a top bestselling style.