I am a quilter and spend a lot of time at my sewing machine. My room has a flat pile rug and I wanted a mat that would make it easy for me to slide my chair in and out as I got up to go to my ironing board or design wall. The size and shape of this mat is perfect and also makes picking up bits of thread that land on the floor a breeze.
The delivery driver left it in a way where there was a bend in the plastic that could not be unbent by putting something heavy on it. Set it out in the sun and it eventually went back into shape and works very well. Not sure how to fix the problem but I gave you the solution.