I use neoprene pads or folded over wraps, in between all my heads and cabs.
I think my mouse pads could be neoprene, but I have no experience to tell, of course.
I use Isoacoustics pucks underneath my studio monitors to kill vibrations and sympathetic resonances; they’re very effective. I was thinking of trying a few sets with my heads at some point, but I keep putting it off because the pucks are expensive, and I don’t have a problem with the PRS amps and tube rattle.
I have used isoacoustics risers with speaker cabs to isolate them and get them off the studio floor, but that’s a different product than the pucks used to isolate a speaker cabinet from a head. Here are the pucks I use with my monitors:
https://www.sweetwater.com/store/detail/IsoPuck--isoacoustics-iso-puck-isolation-puck-for-studio-monitors-and-amps-2-pack?mrkgcl=28&mrkgadid=3319245782&rkg_id=0&campaigntype=dsa&campaign=aaDSA&adgroup=1233692239SA - Studio & Recording&placement=google&adpos=1t2&creative=314973838970&device=t&matchtype=b&network=g&gclid=EAIaIQobChMIg-Cc6p-E3wIVUrnACh2FGwYnEAAYAiAAEgJcpPD_BwE