The Daler Rowney Graduate range offers 6 different blends of hair encompassing natural, synthetic & blends of natural & synthetic. The majority of brushes are either Synthetic (great for acrylic but good all round brushes) or Natural Bristle (great for oil & good for acrylic). But there are 3 more blends particularly suited for watercolour (Pony & Synthetic, Black Goat & White Goat)