Sock pack by Birkenstock, Pack of two, We know you like options, Ribbed design, Button detail, Mid cut, Presented in a branded box. Its not all about new sometimes you cant beat a classic, and Birkenstock is exactly that. Starting out way back in 1774, the footwear brand soon became known for its soft-footbed shoes. Fast forward to today and were still feeling that same level of comfort across its range of mules, sliders and classic, two-strap Arizona sandals.