Tear resistant Bulldog leather upper and rust resistant hardware, Thermaplush soft, next-to-foot wicking layer for warmth, B-Tek Heat lightweight, 4-channel hollow-fibre insulation for high-loft breathability in a broad range of temperatures, Cinched lacing system allows most coveralls to fit over the boots, Leather upper with oil and acid resistant Oarprene base, -100C/-148F comfort rated inner boot system, Hydromax layering for improved moisture management, GelFlex anti-fatigue midsole for shock absorption and rebounding, Aggressive, long wearing, self cleaning outsole design, CSA / ASTM approved, ESR / EH rated,