The Sigma E25 Blending Brush features a slightly firm rounded brush head for the universal blending of products. It works well at softening lines and edges and is great for combining colors on the lids. It s made with SigmaTech fibers which are synthetically engineered to outperform traditional animal hair. They feature technologically advanced filaments with specialized tips developed to hold and deliver cream and powder products without any absorption into the bristles. Built to last the fibers are hypoallergenic antibacterial and will maintain their original shape and color even after several washes. The brush handle is made from lightweight sustainably sourced wood that is durable and scratch-resistant.