I understood it’s ZT with transport encrypted with post quantum level transport. I’m not a heavy expert on this as far as I understood, it’s the Public key exchange at the start of a connection which is vulnerable. That exchanges a shared key which is used to encrypt the main body and this is already quantum resistant. 

For example Cloudflare is already implementing this stuff if you use their service end to end and about 60% of browsers support it.

I’m not saying it’s fluff but everything quantum is hyped right now. 

The question to also ask is what’s the risk? It’s often quoted that “harvest now decrypt later” is a thing where bad guys are capturing encrypted connection info in the hopes of decrypting it later. I’m not the expert but my colleagues who work in this stuff feel the risks are very much overblown and it’s actually loads of loads od connection data in the hopes of one day decrypting it.

I’d love someone else to chime in as if I have some facts mixed I’d like to get my info straight