From Habu Textiles:

“It IS made from bamboo. This one is a single, so please do not use it as a warp for weaving, but is perfect as weft yarn. Extremely soft and the sheen is gorgeous. It also dyes very well. This weight is suited for lace knitting, too.

This is the single version of the XS-6 bamboo. Even softer than the other plied bamboo yarns. Please use it as a weft yarn. Good for lace. It will dye very well also.“