These Raphal paintbrushes feature Kevrin+ bristles, a top-end synthetic simili-mongoose feel suited for use with oil and acrylic paints. The bristles are firm with an excellent elasticity, ideal for painting fine details and finishing touches.Practical information:Never let paintbrushes dry before cleaning.Using a hydrating paintbrush cleaner after using taltine or soap prevents bristles from drying and keeps the supple shape of the paintbrush.