Wikipedia
Izze-kloth
The Izze-kloth or Medicine cord is a sacred cord worn by Apache medicine men that is believed to confer strength and special powers of healing to the wearer. The izze-kloth is usually made from strands of animal hide and its length punctuated with beads and shells. Often, an izze-kloth has four strands, each dyed a different color (usually, yellow, blue, white and black).