Notwithstanding anything in subsections (6) and (7) of this section, in the case of any wool product or part of any wool product which contains not less than 80 percent by weight of wool and otherwise only contains natural fibres of cashmere or mohair, or hair of alpaca, camel, llama, or vicuna, it shall be a sufficient compliance with this section if the label or mark relating to the product shows in the English language the trade description of the main fabric in the product and describes it as ‘all wool’ or ‘pure wool’.”