This toothbrush comes in 2 parts, firstly the handle as well as the bristles. When it’s time to change your bristles (recommended every 3 months), simply change the head (Bristles) and use it on the existing base, therefore reducing your waste! The Bristles are made from certified bio-based plant fibers derived from castor bean oil - totally suitable for vegans and vegetarians! It’s hygienic as it does not retain water and it dries thoroughly between brushings. Animal hair bristles can retain bacteria and they also tend to dry more slowly than contemporary materials.