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