Logitech mouse pad.
Evaluation online can be found, just I have a gust B and purple electric change, specially turned out to take two photos. It feels like a controlled version of the zowie gtf and the graininess is not so obvious and it doesn't slip so that it doesn't feel like handling.
The size, shape and material of the foot patch have a significant effect on the slip, and the ec2b of the small foot patch is significantly more slippery than the medium s310.