Product review (5 stars): Highly recommended for any baking enthusiast, or the baking disaster who messed up ovens!
I have often lined my oven with a custom fit pan, or with simple aluminum foil, but after cleaning my oven recently, I decided I needed something a bit more hearty than my standard silver colored sheet liner.

I ordered these before Thanksgiving and put them to the test the day before and the day of. My oven was on at least 350 degrees for 12 hours one day and 6 hours the next. The mat held up perfectly. No wrinkling or buckling due to the heat, no melting, and thanks to liner, my sweet potato casserole with the butter and pecan and marshmallow topping that bubbled up left no mess in my oven. Once the oven cooled, the crisp baked mess brushed right off and the mat went right back into the oven!

I thought there might be issues with the packaging as the mats arrived very tightly rolled. However, right out of the box, they laid perfectly flat and were ready to go in. I don't know how often I'll have to replace these, but since they come in a set of three, I'm good to go right now. One is in my oven, and one is lining the oven drawer where my flat baking sheets reside.

So far, I love these for my oven!