Metal barb comb. Ideal for separating hair, detangling, combing curls and adding more volume. Ren Natur is a line of biodegradable products made from wheat fiber. Made with natural and recyclable materials. They reduce carbon dioxide (CO2) emissions, eliminating dependence on fossil fuels such as oil or carbon. Ecological and environment-friendly products can also be recycled and reused. Durable and professional construction.