Sorry - the “washcloth” over the face meant as an example for the entire shroud. The image isn’t on there like if it had just been ink/sweat/blood on ones’ face, and then lay a washcloth on the face to soak in the fluids.
I think I see what you are getting at. The Shroud is thought to have had some bodily contact points such as the nose, knees, etc. The high points. It does appear to have been supported by packing around the body, probably the "hundred weight of herbs' etc. that Joseph of Arimathea bought to pack around the body. That would be a lot of plant material.