The Himba are a tribe of nomadic people who inhabit the Kaokoland area of Namibia. They wear bangles made from decorated PVC piping as part of their traditional dress.
The origion of this tradition stems from the materials resemblance to ivory, which was used in former times when elephants roamed Namibia in Large numbers.
These bangels are made by a project organised by the Arts Trust.

See: Bangles