And I'm still wondering why they are still wondering. So they are digging out oversized Caligae. You know that Caligae are? They are sandals. And they are digging them up at a fort at Hadrians Wall. Up in Scotland. Where things get cold occasionally.
Now imagine soldiers, standing guard or patrolling in the cold, wearing sandals. What would they do? They'd wrap up their feet in something warm, like lamb furs. Or cloth. But wadded up feet don't fit into standard-sized sandals designed for bare feet. Solution, rather obvious, is having oversized sandals that fit feet and insulation.