A blend of 5 different diameters of extra smooth fiber ensures the highest color-absorption of any synthetic brush. * Thicker fibers placed on the outside work with thinner fibers in the middle to trap and hold color and distribute paint evenly. * These varying diameters create a sharp edge, stable shape, and energetic spring. * Certified green manufacturing with sustainable wood handles. Nickel Plated Brass Ferrules are the best money can buy. Brush will retain its shape. * Handmade in germany at our family owned factory since 1890