Long tapered bristles are sift to the touch and are ideal for blending eye colors.
Quick Study:

To preserve brushes, clean regularly with a professional brush cleaner and lay flat to dry
To preserve the shape, lay brushes against the skin rather than pushing bristles directly onto the skin
Tool School:

Blend and define eye colors into the crease of the eye
Use to lightly dust highlight to the bridge of the nose
Use with cream, liquid or powder products