Best mat for a Rega Planar 3?

Just purchased the Rega P3 and am wondering about the felt mat. I've read differing accounts about mats, whether to even use one on a glass platter, and what type to use if you do. Any of you with this or a similar TT have thoughts or suggestions? Thanks.
I have two Rega P9's and ditched the felt mats, which caused static and served as dust magnets.  I now use Herbie's mats and have been quite pleased.
Anton - I use the Grungebuster, which was recommended for the P9 ceramic platter.  As for glass platters, you can contact Herbies for recommendations (when they reopen post virus). I also used a cork mat on an old Linn table, but can't remember which one.