What's a "red rope"?

https://www.justice.gov/multimedia/DOJ%20Disclosures/First%20Phase%20of%20Declassified%20Epstein%20Files/A.%20Evidence%20List%20from%20US%20v.%20Maxwell,%201.20-cr-00330%20(SDNY%202020).pdf

Evidence list. Lots of entries that start, "One red rope containing..." eg: "One red rope containing:letter, photo album of girls, photos of island"

Anybody know what a "red rope" is in this context? Pretty sure it's not the first thing that comes to my mind.