Here are some other hairpieces I have done recently. Some of them are not made of synthetic hair, but the method of wearing them is the same!
Those are some natural colored double-ended dreads that ended up in a pair of falls for a customer.
These falls are made with several kinds of plastic rexlace, plastic grid mesh, EVA foam strips, vinyl tubing in two colors, and are mounted on strips of old black teeshirt. My customer had thin hair in a growing-out undercut, so she needed a pair of lightweight falls. So we used plastic rather than synthetic hair! It takes a lot of the massive weight off of the head.
So, my point is...you can use all kinds of things in your falls to make them super fancy, even if you don't know how to make dreads.