Carbon filaments. Gentle whitening. The ultra-fine Curen filaments of the Black is white "Carbon" brush heads are coated with activated carbon. For stylish, innovative, gentle whitening. The Curen filaments of the new brush head are coated with activated carbon particles for gentle but effective tooth whitening: Gentle and effective: Ultra-fine Curen filaments coated with activated carbon particles. , , Every single area can be easily reached: The CURACURVE ergonomics are all down to the perfect bend. Drop-like design for high-precision cleaning, tooth by tooth Extra pleasant: rubberised back. Supports the hydrodynamic effect. Developed with Prof. Dr. med. dent. Ulrich P. Saxer. Compatible with all Curaprox sonic toothbrushes. Made in Switzerland