I didn't purchase these for drying things like jerky. I wanted them for cooling cookies and these will do the job perfectly. Because they stack and leave room between racks, they'll be perfect for cookies. They also have a non-stick coating which will be great for those softer cookies and bars. Now I'm going to try my hand at drying fruits. The bottom tray is a sturdy large baking sheet which can also be used for other things because of it's larger size. For example, I'll use it to let my roasts or turkeys rest to absorb their juices. It's wonderful. I was confident that this brand would give me a quality product, but it exceeded my greatest expectations. I couldn't be happier, and I highly recommend it to anyone.