It's a double-ended brush custom designed to be used with Veil Translucent Setting Powder. The smaller, tapered side is perfectly shaped to fit under the eye for setting the under-eye area, while the large, rounded side is designed to be used for all-over application on the face.
The ultra-soft synthetic bristles are perfectly dispersed and shaped to pick up the ideal amount of loose powder to create the most airbrushed, perfect complexion.