Things wabi-sabi have no need for the reassurance of status or the validation of market culture. They have no need for documentation of provenance. Things wabi-sabi can appear coarse and unrefined. They are usually made from materials not far removed from their original condition within, or upon, the Earth and are rich in raw texture and rough tactile sensation. Their craftsmanship may be impossible to discern.
Simplicity is at the core of things wabi-sabi.
The simplicity of wabi-sabi is best described as the state of grace arrived at by a sober, modest, heartfelt intelligence. The main strategy of this intelligence is economy of means. Pare down to the essence, but don't remove the poetry. Keep things clean and unencumbered, but don't sterilize. Usually this implies a limited palette of materials.