When I work on a foot, I'm not doing anything mystical. I'm doing three things, in a specific order, with a specific pressure.
I press the heel of my thumb into the arch and heel — broad, deep, slow. That's where the biggest muscles are, and where the most tension sits. The mat's 20mm domes do exactly this. Same width as a thumb pad, same depth of pressure.
I work my fingertips into the ball of the foot and the smaller areas around the toes — lighter, finer, faster. That's where shoes numb you most. The mat's fine textured tips do exactly this.