When you first see a USA Pan Cookie Sheet 18 x 14" you'll wonder why it has ridges. These ridges or flutes improve air flow during baking. Count on this bakeware from USA Pan to properly bake your favorite treats. The structure and commercial grade aluminized steel in USA Pans distributes heat quickly and evenly. This bakeware is also highly durable and resists warping and denting. You won't hear that dreaded ping when you put these USA made pans in the oven! Removing baked goods from professional quality USA pans is a snap because of their silicone finish. This non-stick surface also makes for easy clean up! Best of all, USA pans really are made in the USA, in Pennsylvania, of 65% recycled steel.