Update on Zowie G-SR: It never got flat, tried the iron, the text book, leaving it backrolled in the box, and still nothing, Had to change to my old mouse pad HyperX :
BenQ Zowie G-SR Large Gaming Mouse Pad for Esports - Walmart.com
Amazon.com: BenQ Zowie P-SR Gaming Mousepad for Esports I Cloth Surface I Stitched Edges I Small Size : Office Products