The bristle shape is curved upwards for better pan brushing molar.The handle of the OLA Bamboo toothbrush is 100% It is made of natural bamboo wood. The bristles of the OLA Bamboo toothbrush are made of premium nylon for better brushing. The toothbrush head is compact to ensure proper brushing of the molars. Some studies show that bamboo has natural antimicrobial properties. The toothbrush is designed in Canada and manufactured in China.