Good question!
Jon, actually these little AEG toploaders don't have suspension but they stand on wheels with springs. That is what's so funny about these washers, when they start spinning the whole cabinet shakes, they sort of perform a little dance! I have a newer version of this machine and it does the same. You can hardly watch it, you almost go dizzy when you keep watching it for a longer while.
Other H-axis toploaders have an extra lid on the outer tub (my Philips toploader has that) but most have a rubber seal that connects the outer tub to the cabinet.