BirkenstocksBir‧ken‧stocks /ˈbɜːkənstɒks $ ˈbɜːrkənstɑːks/ noun [plural] trademark 
a type of leather sandal (=a shoe that is open at the toes and heel) with a wide flat bottom
a type of leather sandal (=a shoe that is open at the toes and heel) with a wide flat bottom