Crocs, which I wear all the time around the house and the FlowRider (actually light Ride or Life stride, they keep rebranding them. Are the worst sized shoes in the history of shoe sizing. I wear a men’s 10 medium in most shoes, Crocs, I wear an 8. I have made the mistake of ordering online Crocs, and they come and swallow my feet. That said, with the bit around the heel and if you got lucky and had the right size, they probably won’t fall off. Not that it matters to the sports staff operating the zip line, and you will have to wear proper laced shoes!🤣
jc