Both leaf and stem (bast) fibers from plants were used to make these items. Leaves from the plant commonly known as rattlesnake master or button snake root (eryngium yuccifolium) have been identified as the fiber source for several specimens, including the twined bag and many of the shoes. Plant materials were also used as lining or padding in some footwear specimens.

Rattlesnake master plant. The leaves were used as yarns.

View a micrograph of root