Upper: 100% calfskin leather; Inner lining: 75% textile and 25% pig skin; Sole: 100% synthetic; Removable insole; Type of close: Zip; Heel height 4 cm (1.57"); Shaft contour 25 cm (9.84") (size 37 eur/4uk/6,5-7 usa); Extra Comfort; The Memory Foam insole. Maximum arch and heel comfort due to arch support technology giving extra cushioned support