I actually haven't heard of that! What is it?
Discussion
Multi hop vpn. First node is a obscura second node is mullvad. Neither then see full in or out.
Basically it is a service that introduces an initial hop when you establish the connection, for instance:
Your Device -> Obscura -> Mullvad VPN (exit server) -> Internet
In this way, Obscura knows your IP but does not know where you browse, whilst Mullvad knows where you browse, but not who you are :)