Bamboo handle (Moso), Nylon-6 bristles, Metal Bristle-holders, Soybean wax
"The Humble Brush is the world's most sold bamboo toothbrush with a handle made from 100% biodegradable, sustainably-grown bamboo. The bamboo is the fastest growing plant on earth and is naturally anti-bacterial which means that there is no need to use fertilizers or pesticides during its cultivation. It features an ergonomic grip and high quality bristles from DuPont and with its sleek and timeless design it makes it the perfect must-have accessory in every bathroom. The Humble Brush has no disadvantages to conventional toothbrushes and will last you just as long as any mass produced plastic toothbrush. Additionally, it is supported by some of the world's most respected dentists."