Crafted from pure aluminum, the Naturals Big Sheet Baking Pan delivers superior heat conductivity and even heat distribution with no hot spots, producing golden, evenly baked results every time. With 35% more surface area than a standard half sheet, this oversized baking sheet is perfect for big-batch cookies, sheet pan dinners, and meal prep. Encapsulated steel rims provide lasting warp resistance, and a Lifetime Warranty backs this professional-grade, naturally nonstick pan.