The three layers work out to be 1/8 if an inch thick. The outer most layer is a very small hole fishnet. This layer keeps the bee from putting her stinger through the larger middle layer. The middle layer is a pvc coated quarter quarter inch mesh with a thickness of 1/8 inch. These two layers puts a distance between bee and the beekeeper. What is the layer against the skin do? This layer is only to provide a slick surface between the rubbery middle layer and the beekeepers skin.
I have a feeling that Bill wouldn't have published the source of his materials...Since changing hard drive I've lost my link to the material that Bill and others use for their Ventilated bee suits, will somebody please update me.