Sonja is a traditional open-back clog that includes all the supportive features of Danko's classic Professional clog in a mule. It is ultra-supportive and easy to wear so you’re always a step away from legendary comfort. Padded instep collar for extra comfort Oiled leather has a heavily oiled finish that creates a durable and moisture-resistant surface. Roomy reinforced toe box allows toes to move comfortably with plenty of "wiggle room" Leather-lined, breathable, single-density open cell PU foam sockliner Contoured PU midsole provides arch support Inner frame provides stability PU outsole with a wide heel strike for stability Anti-fatigue rocker bottom promotes forward foot motion for shock absorption and energy return APMA Seal of Acceptance ITEM # 247020202