What does it mean when cookware is described as being dual clad?

When cookware is described as being dual clad, it means that it has two layers of metal bonded together. The inner layer is usually made of a good conductor of heat, such as copper or aluminum, while the outer layer is usually made of a durable material, such as stainless steel. This construction provides the benefits of both materials, allowing for quick and even heat distribution as well as durability and ease of cleaning.