The Birkenstock Super-Grip sole is comprised of two components: a nonslip, oil- and grease-resistant outsole made of rubber and a shock-absorbing midsole made of light, flexible EVA. These soles are available in traditional black EVA and gray outsole in sizes 35 to 48. Also available in size 38 in gray EVA with white outsole.
Delamination caused by grease or oil can occur. Unfortunately, this is beyond our control.
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If you should need an advocate… my feet and product on definitely on your side!