Upper: Leather. Lining: Wicking Mesh Lining. Footbed: Removable EVA and Latex Foam. Midsole: Polyurethane. Outsole: Rubber. Construction: Direct Injection. Wolverine electrical hazard (EH) boots and shoes are CSA approved. Special EH construction helps protect the wearer from electrical current on dry surfaces. Puncture resistant (PR) footwear is CSA approved with an internal insole, reducing chances of puncture wounds to the bottom of the feet. Wolverine steel-toe boots and shoes are CSA approved to help protect feet from falling or rolling objects.