All Wise Owl premier brushes are made with premium synthetic filaments which have gone through extensive processing in order to maximize paint pickup and release, durability of brush, and sharpness of tips. The filaments are bonded onto the ferrule with an epoxy to ensure there is no filament loss when painting. All of the handles are stained. The Wise Owl 2” palm brush has an ultra-firm stiffness and it is designed for wax/salve application on very large surfaces. The Wise Owl 1.5” round brush is a firm stiffness, while the remaining brushes are a medium-firm stiffness.