Current U.S. Elastoester Fiber Producers: (Elastoester is not produced in the United States. The only producer is Teijin Ltd., Japan)
Federal Trade Commission Definition for Elastoester Fiber: Elastoester is an official FTC generic fiber type defined as: At least 50% by weight aliphatic polyether and at least 35% by weight polyester. (Complete FTC Fiber Rules here)