Chain saw resistant, meets OSHA Regulation 1910.266. Natural rubber with cotton pile lining, 4 layer insole, ankle-guard and heel grip. Steel toe meets ANSI and CSA standards. ANSI Z41-1999 I/75 C/75. Waterproof. Oil resistant sole. Optional liners and caulks available. U.S. sizes are listed in a range due to conversion from European sizes. Order 1 U.S. full size larger if using a felt liner. The U.S. sizes stamped on the inside of the boot may not match the shoe size conversions in the information given below.