First layer cowhide.Breathable cow linling.Color by hand.Sewn with care.Sweat-absorbing design.Leather production. Package Dimensions : 13.39 x 7.84 x 4.72 inches; 3 Pounds Question:Are they non-slip? Answer:Hi. The shoes are non-slip. Question:Are these actual leather (cowhide) or man-made "leather"? Answer:Please rest assured that we as always only use actual cow leather in making men shoes, so as to contributes its high quality on shoes. Question:What is the equivalent American size for European size 43? Answer:It's size ten (10). Google can confirm that. If you can’t fly,then run. If you can’t run,then walk. But whatever you do.You have to keep moving forward.