16 C.F.R. § 301.9
Use of terms “Mouton Lamb” and “Shearling Lamb” permitted
(a) The term Mouton Lamb may be used to describe the skin of a lamb which has been sheared, the hair straightened, chemically treated, and thermally set to produce a moisture repellant finish; as for example:
(b) The term Shearling Lamb may be used to describe the skin of a lamb which has been sheared and combed.