UPPER #1: 100% COW LEATHER | UPPER #2: 100% CALF LEATHER | LINING #1: 100% CALF LEATHER | LINING #2: 100% SHEEP LEATHER | INSERT #1: 100% ZINC (ZAMAK?) | INSERT #2: 100% ACRYLONITRILE BUTADIENE STYRENE (ABS) | INSOLE #1: 100% SYNTHETIC RUBBER | OUTSOLE #1: 100% SYNTHETIC RUBBER