By Tom Schoenberg – Jan 3, 2013 10:39 AM ET

Amazon.com Inc. (AMZN) and Macy’s Inc. (M) were sued by the U.S. Federal Trade Commission over claims the retailers misled consumers with claims that fabrics they sold were made of bamboo fiber, according to lawsuits filed in federal court in Washington.

To contact the reporter on this story: Tom Schoenberg in Washington at tschoenberg@bloomberg.net

To contact the editor responsible for this story: Fred Strasser at fstrasser@bloomberg.net