Paracord, both the true military spec and the generic paracord is usually made of nylon cord, but that's really just an assumption for the generic product, but either product can offer a couple of problems...one, because of the way it's woven, it can prove troublesome for unmanicured sharp nails and if a bird decides that it likes to chew on the woven cord, it can act like chewed cotton cloth and cause digestive tract impaction.....if you're asking is it is poisonous, you would have to take that up with the manufacturer about materials/ingredients used.....