This is a great example of Surcingle Training being done with a Rope Halter. Notice the head on the vertical, top of the hip, top of the head, and top of the withers all level. This is the softness you want in your animal and the softness that is produced using the Surcingle.
This is showing respect for the halter and when you swap out with the Mule Rider’s Martingale, this is the respect you’ll see for the bit.