Myster Wise Guy
The whole point of the product is a toothbrush with neither plastic nor animal bristles: the handle is white pine and the bristles are agave (lechuguilla) plant fiber rather than nylon. It is one of the few genuinely vegan and genuinely plastic-free brushes on the market.
How clear are their specs?
Names the white-pine handle and agave/lechuguilla plant-fiber bristles directly; being a small maker, it has little independent third-party spec verification.