16 C.F.R. § 303.17
(b) Where a generic name or a fiber trademark is used on any label providing required information, a full fiber content disclosure shall be made in accordance with the Act and regulations the first time the generic name or fiber trademark appears on the label. Where a fiber generic name or trademark is used on any hang-tag attached to a textile fiber product that has a label providing required information and the hang-tag provides non-required information, such as a hang-tag stating only a fiber generic name or trademark or providing information about a particular fiber's characteristics, the hang-tag need not provide a full fiber content disclosure; however, if the textile fiber product contains any fiber other than the fiber identified by the fiber generic name or trademark, the hang-tag must disclose clearly and conspicuously that it does not provide the product's full fiber content; for example:
“This tag does not disclose the product's full fiber content.” or “See label for the product's full fiber content.”
[24 FR 4480, June 2, 1959, as amended at 79 FR 18771, Apr. 4, 2014]