Helu. Comb. Helu (comb) or helu tu'aniu (coconut midrib comb) as they are commonly referred to, are ornamental combs which are worn by females in Tonga. They are a popular personal adornment amongst Tongan women and girls alike, and rose to popularity in the 18th century. Helu are primarily made from tu'aniu (coconut midrib), bound with pulu'i niu (coconut husk) and decorated with beads. Helu can also be made from other materials such as wood and tortoise shell and are ornately carved. This is a helu tu'aniu, it is light in colour and rectangular in shape. It tapers out towards the bottom where the teeth form a slight curve. Dark and light brown pulu'i niu decorate the helu in the form of decorative lashing, this also holds the helu together.