Turntable mats have been always a big discussion how they influence the sound. The interaction between the record and the surface can be tracked very easily by the supersensitivity of a good pick up cartridge.
Common felt mats give a smooth contact between record and platter but has the disadvantage with static. That means that feltmats often collect a lot of dust which can be then transfered to the record. Also the damping ability is very limited which can be a problem with metal platters. Thick rubbermats overdamp the record and have an isolation effect which leaves the static on the record and hearable noise clicks are the result.