For wash and background its chiseslled edge gives a high degree of line control.
 
Petit Gris (Squirrel) hair is the finest natural fibre in the world. The highest quality being Kazan. The nature of this ultra-fine fibre enables the hairs to be extremely tightly packed into the ferrule, which creates a brush with unsurpassed colour absorption.
 
These properties make squirrel hair brushes ideal for appyling washes as they can deliver large quantities of colour to paper without the need to return to the colour palette.