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 :
Zowie G-SR medidas 480 x 400 x 3.5 mm negra - Alfombrilla | LIFE Informàtica
BenQ Zowie GS-R Mousepad Gaming para eSports | PcComponentes.com