NuBone combs are hand crafted from 100% organic resins. The Nubone material is hard and smooth, and every handle, tail, and tooth is hand sanded and polished to an exceptional finish. This exceptional finishing means NuBone combs will not tear or snag the hair. They are also completely anti-static and can be used with hot implements without fear of damage. Due to their high heat resistance, the Nubone Combs are ideal to use with popular hair straightening techniques from Brazilian Keratin to Japanese straightening.