The Karl by Dansko is a great slip-on shoe with many great features. High quality leather uppers follow the natural contours of the foot, while the roomy toe box provides durable reinforcement and toe protection. A polyurethane outsole provides shock absorption and protects the feet, legs, and back during long hours of standing and walking. Other features are the nonallergenic leather sockliner, water-resistant upper and nonallergenic insole.