This is a pair of boots that a giant (well, a giant human, not like the giant giants in the Castle in the Sky) would wear to ride a motorcycle. Presumably a giant motorcycle, because a giant on a normal-sized motorcycle would look pretty silly. Y'know, like the kids these days riding those weird scaled-down versions of street bikes, with their knees all sticking out under their elbows.

Anyway, if someone ever says they need your clothes, these, and your motorcycle, just give them to him. It's not worth dying over, man.