Dansko Women's Professional Mystic Patent ClogSize Chart The Dansko Professional is our flagship clog. Inside its iconic silhouette is a roomy reinforced toe box, an anatomically contoured PU midsole, an inner frame for stability and support, a padded instep collar, and a protective heel counter that allows the heel to move up and down freely while providing lateral stability. The anti fatigue rocker bottom assists with forward motion while walking to add hours of comfortable support throughout