The F55 Small Duo Fibre Brush by Sigma features an airy, flat brush head. This brush works best with powder, cream and liquid products buffed onto the skin for a well-blended and light finish. It's made with SigmaTech fibers, which are synthetically engineered to outperform traditional animal hair. The technologically advanced filaments with specialized tips are 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. Brand: Sigma. Style Name: Sigma F55 Small Duo Fibre Brush. Style Number: 5038528.