Ultra durable carbon steel is made with an innovative nitro heat technology to seal the surface of the pan and help lock out moisture, making it rust resistant and 22% harder than traditional carbon steel. A hybrid of the best cookware qualities, nitro carbon steel combines excellent searing and heat distribution, lighter weight, and the ability to build a seasoning that performs like nonstick over time, for the ultimate kitchen workhorse and the perfect do-it-all pan.