All our Brushes were made of nature birch wool, Ultra-fine Synthetic Hair with good adhesion to powder, perfect feeling on skin Anti-bacterial craft Antirust Aluminum tube 100% Brand new in retail package Made of High Quality Soft Synthetic Hair Bristle    How to keep our ultra-soft synthetic hair brushes in good condition. Wash with warm water or cleanser after Dry in air no wring Keep dry So this professional brush kit will follow up to 10 years!