1. The band
The clear band allows the hairs to be spread apart giving it a more natural appearance (apply directly to the lash line). Having the band like so allows you to cut and maneuver the lash easily without sides sticking out, or worst the lash falling apart when cut to fit your exact eye-shape.
2. Natural and soft
It needs to look and feel delicate. As you can see with these eyelashes the faux hair looks natural mostly because of the fan shape and also because of the thinness each individual lash holds.