Tri-Ply Stainless combines the beauty of stainless steel with the superior performance of aluminum. Interior and exterior layers of surgical-quality 18/10 stainless steel surround an inner core of highly-conductive, heavy-gauge aluminum. The aluminum core is not only on the bottom of the pan, but continues up the sides of the pan to spread heat evenly and respond to temperature changes quickly. The softly brushed, stainless interior provides clear visual clues when cooking and naturally masks signs of wear. And the mirror-polished exterior provides the brilliant look stainless lovers admire. Our ergonomic Cool V handle design provides superior balance and feel, and vents heat away from long handles, keeping them touchably cool on the stove-top. Domed, tempered glass covers let you monitor cooking at a glance, and they recirculate moisture and nutrients back into food.