A sturdy bone needle would have been needed to tightly weave the fibres into a stiff matting. The tanga consists of a vest backed by a large trapezoidal guard board secured around the front by a side bands that tie together at the waist area. The resulting garment is very effective at protecting the main organs of the body against lethal weapons of war. The tanga is decorated ira n atu (human hair) overlaid on the tanga in small geometric designs on the guard board. These consist of a wide horizontal bar separating two rows of diamond shapes. The tanga is medium-brown in colour due to the natural colour of the kora. While the making of te kora was primarily the work of women, the making of bwai ni buaka was the specialisation of select male experts carefully guarding their konwledge and often passing it through family lines. Bwai ni buaka were custom made to be worn by male warriors. Rituals would be performed as part of the making of bwai ni buaka as well as for the person for whom it was intended.