I have been following this maker for quite some time & Ive been obsessed with the work space mat they use. It seems to be durable enough to punch, cut & hammer on. (YouTube link below) Im curious if anyone can help identify the material? I tried commenting on some of their videos with the question, but I never got a replay. Any help would be greatly appreciated. Thank you in advance. https://youtu.be/i3YaSEvm2no