... the ture eco-friendly bamboo yarn is bron, made by the lyocell process. "Bamboo lyocell fiber", also can ... say "bamboo yarn made by the lyocell process".It is the ture eco-friendly ... bamboo fiber is bron, made by the lyocell process, similar to the Tencel yarn ... the bamboo fibers are mainly made from bamboo pulp by the viscose process. It is actually rayon, now ...