A little research on "fabric straps" was interesting. That "load securing" caught my eye. I wonder if the supply trucks to the drug store used that. I see ads for heavy cotton webbing for arts and crafts, too.
Is it something that was left at the scene and they are looking for a match?
What is the strap fabric called?
Webbing is a strong fabric woven as a flat strip or tube of varying width and fibres, often used in place of rope. It is a versatile component used in climbing, slacklining, furniture manufacturing, automobile safety, auto racing, towing, parachuting, military apparel,
load securing, and many other fields.