Dansko Men's Karl Box Open Back Clogs- BlackKarl is a traditional open back clog that features a roomy, reinforced toe box, an anatomically contoured PU midsole, an inner frame for stability and support, a generously padded instep collar, and an anti fatigue rocker bottom that enhances forward motion while walking. Patented stapled construction Leather Padded instep collar for comfort when walking Roomy reinforced toe box for protection with plenty of "wiggle room" for your toes PU outsole with