These are the 70's triangle cut Halter Tops that will fit most body types. Please measure yourself to make sure these items will work out the way you are hoping.
Rats will run a rope tied tightly to each side of their cages or two chairs and pulled tight by moving the chairs away from one another. You can train them to come to you when called from one end of the rope to the other.
In the high plains of South Dakota, USA