Turntable mats have always been a big discussion about how they affect sound. The interaction between the record and the surface can very easily be followed by the hypersensitivity of a good pickup cartridge. Ordinary felt mats provide a smooth contact between record and turntable but have the disadvantage of static electricity. This means that felt mats often collect a lot of dust that can then be transferred to the record. Also, the damping capability is very limited, which can be a problem with metal plates. Thick rubber mats dampen the plate and have an insulating effect which keeps the plate static and results in audible clicking noises. Leather and cork are 2 different but very interesting options to improve sound quality. Resonances are better damped than felt, they keep dust away and they also have enough contact to prevent static electricity. Which is better depends on taste and the actual design of the dish. A very cost-effective way to improve sound and have less noise from static and dust. You can hear a difference!