This Shade & Diffuse Eye Brush by bareMinerals is a great makeup brush you can definitely rely on. It is a whisker-tipped brush that embodies functionality at its finest. It has a unique design with two types of synthetic fibers combined in a single brush for multi-purpose application. The shorter fibers are packed to put and build up color intensity on your skin while the longer and stretched fibers effectively blend, diffuse and provide a sheer finish ideal for your delicate and shimmering pigments. But it doesn't stop there, flipping the brush on its side makes it possible to contour and define crease, adding more functionality to this single tool. The brush is excellent to use with the Prime Time Primer but also works well with cream or powder eyeshadows and concealers.