Royal Catafalque Procession of Her Late Majesty Queen Halaevalu Mata'aho, the Queen Mother from the Royal Palace to Mala'e Kula Royal Tombs. Nuku'alofa, Tongatapu, The Kingdom of Tonga. 1st March, 2017.
the bigger the mat, the closer you are to the deceased. Its to signify mourning & also your social rank to the deceased. Sisters have a higher rank than brothers so its usually the brothers and their children who wear the big mats over their heads, its to signify their lowly status to the deceased as a form of respect