What is FOE? Fold Over Elastic! Also known as Hair Ties! If you have ever ordered from us, you have received one of our hair ties on our business cards. Hair ties are made from FOE. These are great to Slide on Business Cards, Throw in packages for freebies, extras for monthly or theme boxes, the list goes on! They are always a hit at our vendor market events. They make great Table Fillers, too!