Halo hair extensions and clip-in extensions are both great options for adding length and volume to your hair, but they go about it in different ways. Halo extensions are attached to a clear band that sits at the crown of your head making them comfortable to wear and less damaging to your natural hair. On the other hand, clip-in extensions are applied by clipping them into your natural hair, which can be more time-consuming and can cause more damage over time.