Complex sentence: They usually have long ties on either side that are wrapped around the head to secure the do-rag by tying at the back of the head; the old do-rags were tied at the front of the head.
Split into simpler sentences: They usually have long ties on either side that are wrapped around the head to secure the do-rag by tying behind the back. However, the old do-rags were not tied behind the head but on the front of the head.