bareMinerals Shade & Diffuse Eye Brush. This whisker-tipped brush is functionality at its finest. bareMinerals combined two types of synthetic fibers within one remarkable tool. The shorter, packed fibers place and build colour intensity. The longer, stretched fibers blend, diffuse and deliver a sheerer finish ideal for delicate or shimmering pigments. Flip bareMinerals Shade & Diffuse Eye Brush on its side to contour and define the crease. Use best with: Prime Time Primer, eyeshadow and concealers.