These bamboo brushes are 100% bio-degradable and hence an earth friendly and healthy option. A small change in your daily routine will be your first step towards a greener environment. Bamboo is an easily renewable resource and hence is a sutainable option to the hazardous plastic brushes. This pack of 4 contains 2 brushes with charcoal infused bristles which help in whitening of teeth and 2 brushes with soft bamboo bristles. This pack is ideal for a family of four.