The Ocean87 brush head is replaceable. Changing the brush head means reducing waste by 87%, safeguarding nature and the oceans. The bristles contain castor bean oil, a renewable and natural resource. The natural and renewable cellulose acetate toothbrush is made of cotton fiber and wood. Cellulose acetate is obtained from the processing of the cotton fibre and wood, with plasticizers from vegetal origin. The material is thus obtained from completely renewable and widely diffused resources on the planet.