Are you into natural dyeing? Eri silk, also known as Peace Silk, makes the perfect protein fiber for absorbing natural plant-based color dyes. Subscribe to receive notices of our growing undyed yarn selection. Featuring a range of yarns from undyed yarn handspun fine to bulky. Weavers like our Eri silk mill spun fine 60/2 for the warp and the traditional spindle handspun for the weft.