Originally Posted by
brenvs
If it has measurement markings on it, even if you do get it to lay flat again, I wouldn't trust the markings to remain accurate. For those is hot climates, think about when a tar or asphalt road "melts" and the streets markings get all wavy and weird.
I don't trust the measurement marks anyways; they aren't always accruate. I might use the if I need about a certain size but if I know I need a certain size then I use my ruler for measuring and the mat is just for cutting on.