The knotted string body armor, shown below, is made from the inner bark of a tree. It was collected in Papua New Guinea (Irian Jaya), Indonesia by Denise O’Brien.
“The knotting uses variations on a continuous figure-8 technique. The string is twisted as the work progresses. The bands of different colors on the upper part of the vest are created from orchid vine wrapped around the central core of tree bark string” (from Art-Pacific.com).