KEEN Utility Men's Durham ESD Soft ToeWork Boot 100% Leather/Synthetic Made in the USA or Imported Rubber sole Electro static dissipative (ESD) footwear is constructed to reduce excess static electricity thermoplastic polyurethane shank for midfoot support Removable metatomical dual density ethylene vinyl acetate footbed Pu midsole for long-lasting comfort Pu reinforced upper for added durability and support