Lyocell is a generic fiber name; Tencel is not.

Bibliographic Details
Corporate Author:	United States. Federal Trade Commission
Format:	Government Document Book
Language:	English
Published:	[Washington, D.C.] : Federal Trade Commission, [2001]
Subjects:	Rayon > Labeling > United States. Clothing and dress > Labeling > United States.
Online Access:	https://purl.fdlp.gov/GPO/LPS104247