Swiss Diamond XD is the latest, most advanced diamond re-inforced non-stick cookware to date. XD is produced using a new coating formulation developed in the Swiss Diamond lab in Switzerland and an advanced production process pioneered in their manufacturing facility. The result is a significantly rougher cooking surface with even better food release properties. - Made in Switzerland - Cook without oil - Eco-friendly production process - Oven safe up to 260 degrees c -  Limited lifetime warranty