The All-Clad c2 Copper Clad Collection features an extra-thick copper exterior. The cooking surface is hand polished 18/10 stainless steel that cleans easily. The thick copper construction means it will heat quickly and evenly, giving you more control over your cooking temperature. These two layers are are bonded together for long-lasting cooking pleasure. All-Clad c2 Copper Clad cookware is made in the USA and includes a lifetime warranty with normal use and proper care.