They're very soft and pliable, with shoe strings that tie.
They're marked HASBRO on the soles.
I had no clue what they were, and no luck finding them on the web--this is what Mr.Vintage3D Joes had to say: "Though
they are mark hasbro they were apparently never issued in the US. They
did come with some early British Action Man sets. The laces often rip
trough the holes; those appear to be very nice. A cool find!"
Thank you again for your help. :)