It's microfibre lined removable and replaceable cork and latex footbed gives you the ultimate comfort, with a heavy sole and slight raised back. The Super Birki is also suitable for vegans. Fit Your toes and heel should not touch the rim of your sandals while standing in them. The extra room is needed to perform the natural rolling motion of the foot without restrictions - just as if you were barefoot. Birkenstocks are designed to be roomy. When you first try your sandals they might feel big. Most people are fine with a regular fitting, but if your foot moves side to side when you walk and adjusting the strap does not help, a narrow fitting may be more suitable. Birkenstock's Super Birki is the ultimate practical clog; Its weatherproof and seamless construction is ideal for leisurely and professional use. It's microfibre lined removable and replaceable cork and latex footbed gives you the ultimate comfort, with a heavy sole and slight raised back. The Super Birki is also suitable for vegans.