This item is made of 52% BCI cotton and 48% tencel. The Better Cotton Initiative (BCI) is a non-profit group that promotes better standards in cotton farming and practices. BCI exists to make global cotton production better for the people who produce it, the environment it grows in and for the sector’s future. Tencel is made from wood pulp, gained from responsible managed, sustainable certified forests. Tencel eliminates the negative environmental impacts of traditional fiber processing. This combination results in a pleasant fabric that supports the body’s natural thermal regulation.