Gel brush No6 oval (synthetic red saber) The quality of a brush is judged by the quality of your hair, so Didier Lab offers a line of brushes designed specifically for nail technicians after a detailed study of their specific needs. Didier Lab brushes are essentially made of the best synthetic Tiger Toray bristles. These are the best synthetic hairs on the market, they are very similar to marten hairs. The brush remains flexible while maintaining its firm shape even when it is largely soaked with liquid. The application of the gel will be more precise and easy.