Heavy-duty value plus poly pan liners combine strength and value. They're made from 0.8 Mil PTL material that gives great performance at a fraction of the cost of nylon pan liners. Use Value Plus poly pan liners to protect oven baking and roasting pans, steam table serving pans and cooking pots and more to make clean up a breeze. Using these popular pan liners is a great way to save on labor/clean up of cooking pans in busy kitchens. They also preserve the life of pans by acting as a physical barrier to sticky and baked-on residue and thus avoiding the repetitive scrubbing that reduces the life of the pan. The liner bags are designed to withstand temperatures from 400 to -100°F, so they can be used for short term food storage as well.