@ai6yr
The brown ones are from Cirque du Soleil's Beatle's LOVE production. Looks like they've been doing that one for a looong time, so no idea how old those are. But based on the wear, that pair was sweated in quite a bit by dancers/acrobats 😂

Very similar ones have been sold on Ebay in the past 6 months. But the costumes have likely evolved over the years, so it might be hard to find that specific one in video of a performance. Here's a couple similar: