Review on 🔒 ESD Safe Anti-Static Mat with ESD Wristband and Grounding Wire - HPFIX Silicone Soldering Repair Mat, Heat Resistant up to 932°F for iPhone, iPad, iMac, Laptop, Computer - 15.9” x 12” Grey by Jonathan Reddick

So I chose this more expensive mat over others because they try to list resistivity while others claim ESD safety without giving numbers. With a measuring device measuring several hundred megohms and contact surfaces of any size very close together, the mat is "open". I'm assuming the mat is regular silicone that doesn't dissipate static electricity. I give 2 stars because the carpet is actually very nice.