Dread Bun with just 1 elastic.
Go to put your hair in a pony tail, but don't pull the hair all the way through, so it's doubled up with the ends hanging out.
Wrap the ends around the elastic and tuck them in wherever they reach around.
They key is a good Dreadlock elastic, one that is thick and strong and supports your hair. You can find the dread ties we use here.