Sigma Beauty F53 Air Contour/Blush Brush Sigma Beauty F53 Air Contour/Blush Brush Buy Online | Fast Shipping | Free Delivery over £25 | Free Returns | Not on Amazon Sigma Beauty F53 Air Contour/Blush Brush A duo-fibre super-soft brush, Sigma's contour/blush brush allows you apply bronzer and blusher every day with an even coverage. With a slightly angled brush head for definition and contouring, this feathery fibre brush seamlessly applies colour to your face for a beautiful, healthy-looking glow.. Vegan and cruelty-free | Buy Online | Fast Shipping | Free Delivery over £25 | Free Returns | Not on Amazon