Hi Angie,
It looks like they used a round braid. Here is what I found on youtube:
[ame]http://www.youtube.com/watch?v=NLjs_MeGNpo[/ame]
Interestingly, it looks like they may have also used this technique for the flat parts:
[ame]http://www.youtube.com/watch?v=xKOKn7wazJA[/ame]
It looks like they used a round braid. Here is what I found on youtube:
[ame]http://www.youtube.com/watch?v=NLjs_MeGNpo[/ame]
Interestingly, it looks like they may have also used this technique for the flat parts:
[ame]http://www.youtube.com/watch?v=xKOKn7wazJA[/ame]