The Eye Shadow Blend 13 Brush, $55 USD, is a thin and slightly tapered blending brush. It is perfect for use in and around the crease area. I love the long but narrow brush head, which distributes pigment efficiently and evenly. The extra-soft bristles make me want to reach for it every time.
The shape is closest to the NARS 13 and MAC 226, but the Tom Ford is the most densely packed so I can kill two birds with one stone (apply color and blend out with the same brush). The Bobbi Brown Eye Blender and MAC 217 are best for softening edges as opposed to setting down color. The resistance makes this Eye Shadow Blend brush an interesting addition to any eyeshadow brush collection.