The Sigma F57 Emphasize Contour™ Brush is curved to fit under the cheekbone with our trademarked Sigma Tech® fibers, uniquely cut for contouring. Apply cream & powder contouring products with precision just under the cheekbone for a chiseled contour. Unique Feature: Curved to fit hollows of the cheek; Function: Easy contouring; Recommended Use: Chisel the cheekbone with cream or powder products in one swipe.