Birkenstock Florida Birko-Flor Triple Strap Sandal,Black,40 M EU 100% Birko and flor: a water and resistant synthetic alternative to smooth leather that won't stretch or fade. Rubber sole Heel measures approximately 1/4" Original suede-lined cork/latex footbed Fully adjustable triple-strap sandal Shock-absorbing EVA sole Please see Sizing Chart for US size conversions