Great for your teeth! Great for the planet! SenzaBamboo s packaging and bamboo handles are biodegradable. Curved nylon bristles are tough on plaque and keep your gums healthy. Current technology for biodegradable bristles do not meet our desired results so our bristles are top quality soft nylon bristles. When disposing of your toothbrush pluck the bristles with pliers and you have a biodegradable bamboo stick!