I follow him on facebook and he makes these shoes or just promotes them, bought them a few monthes ago and now get to wear them around the Kibbutz. They're called slickers for being a combination of Snickers and Sleepers, here's the link: https://slkrs.co/
These are actually pretty popular among players, or at least that's what I read. I'm guessing they're more comfortable than regular slippers and sneakers. If I was in the league I'd probably rock em all day.