We've been asked why we chose to carry toothbrushes with nylon bristles, and our answer is this: At this point, we haven't come across a compostable bristle that lasts. Bristles are the part of the brush that determines when it's time to chuck it, and they are a very small amount of material. If you can keep the brush twice as long (using half the bamboo in the process), we consider that worth the compromise. Progress isn't perfect, folks - and we're always looking to improve upon our offering, so don't hesitate to reach out!
Even National Geographic has published an entire article on the problematic plastic toothbrush. Here is one of the easiest swaps to make as you phase out plastic for good.
Care & Use Instructions: Brush as normal. Store upright to dry. When done with toothbrush, snap off the head to throw in trash and compost the handle.