What are the qualities of Artists’ Hog Brushes vs Monarch Brushes? Hog brushes are made from a natural bristle, with curved hair to carry colour; they leave a distinct and obvious brush mark. A Monarch brush is made from ployester filaments and gives a softer resist for a smooth and even surface to your painting. Essentially, hog brushes are ideal for thick, gestural mark making and Monarchs are perfect for large flat areas of colour. Both varieties come in a range of shapes and sizes so you can choose the brush head that best suits your work.