All-Clad's MC2 Collection is a contemporary line with industrial styling with brushed aluminum exteriors, gleaming stainless steel interiors and handles, and 3-ply bonded construction for exemplary cooking performance. The cooking surface is hand-polished 18/10 stainless steel that will not react with food. The inner core is pure aluminum not just at the bottom, but all the way up the sides. All three layers are bonded together for optimum heat conductivity. The long, stay-cool handles, non-corrosive rivets, and sure-fitting lids are all of gleaming stainless. To maintain its appearance, it is best not to put MC2 in the dishwasher.