do moon boots have a left and right

In Australia, “moon boot” usually means the medical walking boot your physio hands you, not the après-ski fashion number.

Most medical moon boots are universal—no dedicated left or right—so you pick the correct size, centre your heel, and cinch the straps snug. Some hinged/anatomical designs (and certain tall walkers) do come in left/right versions, so check the label or product listing. If you mean the fashion “Moon Boot”, they’re largely symmetrical and sold as a pair, but they’ll settle to your feet either way. When in doubt, follow the fitting guide or ask your clinician; limping is not a personality trait.