The new design uses more copper. The highlight of our sauté pan is the 3.5 Mm thickness. The copper exterior is 1.5 Mm, the aluminum core is 1.5 Mm, and the stainless steel interior is 0.5Mm. Home chefs that love conduction in their pan will cherish this everyday use item. The aluminum core is a good compromise (over copper core). This pan will heat quickly on the stove but also cool fast to prevent burning. The 11-inch frying pan excels in browning meats and for sautéing vegetables. Our pan has a 3" straight side for sauces, gravies and curry. The classic elegance of the copper bottom will tarnish into a heirloom tarnished patina that has been cherished by mankind for ages. Brighten up your life with the glow of copper. Master the art of deglazing and caramelization and make perfect fond for delicious sauces. The stainless steel surface interior is easy to clean and is neutral to taste. This pan requires very little oil and encourages healthy cooking. Delicious gourmet entrees promote small helpings and cut down on caloric intake. The ergonomic riveted handle allows for robust use.