I have had two different Herbie's mats on two different TTs. A standard Herbie's replaced the felt mat on an older LP12 and his thickest mat has now replaced a rubber mat on my LT-30. I just picked up (here on Audiogon) a vintage (year not use) EON Isolation mat. It seems like it has layers of isolation with a thin cork-type top layer. I can't use it because it isn't thick enough and suggests the use of a record clamp with it. If you're interested in it, email me. otherwise, I strongly suggest Herbie's mats.
Record mats for vintage tts
What record mats have been found to work best with vintage tts, like Garrard 301/401, Lenco L75, Technics SP10, Denon, Sony, etc? Those tts almost all sported rubber mats that were said to have been specifically designed for the respective platters. I wonder if indeed that holds up in the modern era, where we have such a wide choice of after-market mats. I've been going back and forth between a Herbie's and a Boston Audio Mat 1 on my Lenco and can't quite decide which is best in my system. The stock Lenco mat is very decent sounding, too.