The summit brush is the next generation of white synthetic allows for maximum color holding capacity and is great for watercolor, gouache and fluid acrylics. Summit’s blend of hair is stiffer than a traditional watercolor brush, but not as stiff as Umbria or Catalyst which makes it just right for fluid applications.Details:Flat wash1.5"White syntheticSturdy ferrule Attractive blue lacquered handle Medium to firm stiffnessIdeal for watercolor and acrylic