These Cotman Watercolour Brushes from Winsor and Newton are made from fine synthetic fibres, perfect for all your watercolouring needs. They are constructed using several different fibre thicknesses. The denser strands provide sturdiness and the finer strands hold the colour. This blend delivers the perfect mix of strength and smooth paint application. Handles are produced to ensure maximum security, while ferrules are clog and corrosion resistant and easy to clean.