Where a textile fiber product is made in part of elastic material and in part of other fabric, the fiber content of such fabric shall be set forth sectionally by percentages as in the case of other fabrics. In such cases the elastic material may be disclosed by describing the material as elastic followed by a listing in order of predominance by weight of the fibers used in such elastic, including the elastomer, where such fibers are present by 5 per centum or more with the designation "other fiber" or "other fibers" appearing last when fibers required to be so designated are present. An example of labeling under this paragraph is:
Front and back non-elastic sections:
50 percent Acetate.
50 percent Cotton.
Elastic: Rayon, cotton, nylon, rubber.
Rayon
Wool
Acetate
Metallic
Other fibers
100% Biconstituent Fiber
(65% Nylon, 35% Polyester)
80% Matrix Fiber (60% Nylon, 40% Polyester)
15% Polyester
5% Rayon
16 C.F.R. §303.10