Help modeling a fabric arm sling as if it is on the user.
I am trying to design am arm sling. The sling wraps around both shoulders and the back. I have attached a picture better explaining the design.. I am having trouble trying to model this. The materiel this sling is made out of is fabric and I need a CAD model of the cloth after it has been tied around the user. I am having trouble trying to get the folding lines correct while keeping a hollow shape in the middle as though its wrapped around a person.
What would be a good place to start modeling this? What features should be used to create this shape but still give me a hollow center?
I appreciate your time!!