The most interesting thing for me is “why the complexity?”.
Because it’s all cut from a single piece of leather and the cut outs aren’t large enough of themselves to be useful, why go to all the trouble? All the gaps expose the feet to more potential harm than a fully enclosed upper. If it’s for heat relief a more open sandal would seem to be better.
What drove the design choices made here?
(It does suggest there’s a potential market for Forgers to make some period specific clothing & footwear for all the SCA types out there.)