Not at all convinced by this . .? ??
I use an antistatic mat as my bench covering at all times, grounded, linked to PSU, linked to soldering iron.? ?It runs to the front of the bench so my arms rest on it automatically but for known super-sensitive work I wear a strap too.? ?
They wear out in time but the next is already in the cupboard.? ?ps their surface resistance is very high but a good GigOhm meter or tester will see it over a few inches and a HV insulation tester easily for a periodic test.? Their aim is to drain static slowly, do no harm to live circuits parked on them and also be non skid . .?