Birkenstock MEDINA men's Flip flops / Sandals (Shoes) in Beige Synthetic, Available in men's sizes. 7. Upper: Birko-Flor, a super soft & resistant material exclusive to Birkenstock Midsole: Cork & Latex Arch support Toe protection pad Deep heel shell Vegetable tanning (chrome free) Free Next Day Delivery & Free Returns on all orders!