The environmentally-friendly ceramic nonstick surface on Zwilling Sol Thermolon fry pans is heatproof up to 500 F to accommodate high-heat cooking or searing. PTFE- and PFOA-free, patented Thermolon ceramic technology is a breakthrough in nonstick cookware to prepare healthy entrees without using oil or butter. With the magnetic stainless-steel exterior and strong aluminum core, these energy-efficient nonstick fry pans conduct heat evenly from rim to rim for uniform cooking, without hot spots.