Sigma Beauty F23 Soft Angled Contour Sigma Beauty F23 Soft Angled Contour Effortlessly contour and define your face with Sigma's F23 Soft Angled Contour brush. This super-soft SigmaTech® fibre brush allows you to achieve precise and flawless coverage. This fluffy brush is a must-have for everyday application of blush or bronzer to cheekbones, resulting in a natural and healthy glow. Cruelty-free and vegan.