Birkenstock Yao White Adjustable Slide Sandal SIZE 37 Narrow (US size 6 / 6-1/2). Only worn twice, in great condition. Upper: Manmade Birko-Flor or Birkibuc Design: Slide sandal Closure: Adjustable rose gold buckles Toe Type: Round, open Back: Open Lining: Manmade, felt upper; leather, suede sock Footbed: Original Birkenstock cork/latex footbed with deep heel cup, arch support, toe bar Sole: Manmade EVA