16 CFR § 303.11
Floor coverings containing backings, fillings, and paddings
February 12, 2021
In disclosing the required fiber content information as to floor coverings containing exempted backings, fillings, or paddings, the disclosure shall be made in such manner as to indicate that it relates only to the face, pile, or outer surface of the floor covering and not to the backing, filling, or padding. Examples of the form of marking these types of floor coverings as to fiber content are as follows:
100% Cotton Pile
Face—60% Rayon, 40% Cotton
Outer Surface—100% Wool