The Sigma collection takes a step further by creating a 3-layer cookware set made of magnetic stainless steel, aluminum, and stainless steel, allowing for excellent heat conductivity. With a PFAS-free ceramic non-stick coating ILAG Xeradur 5, based on sol-gel technology, you can achieve the best cooking results naturally and with outstanding performance. The Sigma Wok is high-quality and made from quartz crystals that formed over 15 million years ago through alpine folding. This wok is crafted from one of the best materials for cookware: stainless steel. It is a resilient and very durable steel, enabling you to enjoy cooking for many years. With a matte exterior that adds an elegant touch, it fits seamlessly into any kitchen. To extend its lifespan, we recommend hand washing with warm soapy water. Suitable for all types of cooktops: vitro, halogen, electric, gas, and induction. PFAS-free.