It is ceramic-coated cookware.  It is made of smooth ceramic-coated aluminum. The mineral-based finish claims to keep toxins from leaching into your food while releasing 60 percent less CO2 than many other nonstick pans on the market. From Caraway.com "Traditional non-stick cookware (over 95%!) is made with chemicals that can leach into your food and home. At Caraway, our cookware is made with a 100% non-toxic ceramic coating. Now that’s something to celebrate."