Upper: 100% calfskin leather; Inner lining: 75% pig skin and 25% textile; Sole: 100% synthetic; Removable insole; Type of close: elastic; Thickness of the sole 2.5 cm (0.98"); Extra comfort; Leather: soft, shiny with unique processing; Comfort: the top priority in every design; Technology: flexible soles, ergonomic uppers and lightweight materials