By standards of textile industry of country, wool sweater containing 100% wool is called pure wool sweater no matter it is worsted or woolen. In fact in order to improve property of yarn worsted wool product is allowed to contain no more than 5% other fiber like polyamide or polyester fiber. Woolen product is allowed to contain no more than 7% other fiber.

If used for decoration and decorative fiber must be visible, then other fiber content in finished non-worsted wool can be relaxed to 7% and content in woolen product is allowed to contain no more than 7% non-wool fiber. But both (referring to decorate and improve spinning performance) shall not exceed 7% of the total.

If pure wool sweater contain 7% non-wool fiber by the standard, whether it is worsted or woolen goods, it can only be labeled as "pure wool", and not labeled "100% wool". Only the finished wool product with gross amount indeed 100%,can be labeled as "100% wool” on the trademark or logo.