Cellulosic fibers such as Tencel+Plus™ Lyocell from Eucalyptus, and Viscose Rayon from Bamboo are both man-made fibers from natural origins. What differentiates them is the process by which the trees are made into fiber.
The US Federal Trade Commission (FTC) has generically grouped the two methods into two classifications :
Bamboo Fiber is made through the Viscose Rayon method. Tencel+Plus™ Eucalyptus Fiber is made through the Lyocell method.
What differentiates these two methods is simple. There are approximately 13 different toxic chemical solvent processes in the Viscose Rayon (Bamboo) method. There is only one solvent in the Lyocell (Tencel+Plus™ Eucalyptus) method; and the FTC has recognized the Lyocell solvent as “a non-toxic solvent and in that process is almost 100 percent recycled and reused.” Additionally, with every stage of processing comes further energy and water savings.
The obvious environmental choice is Tencel+Plus™ Lyocell
Just ask the Federal Trade Commision http://www.ftc.gov/opa/2010/02/bamboo.shtm