Sheer iridescence
It is quite sheer (as per the swatches) and needs to be built up at many times to achieve the look in the model pictures. I do like the colours though (got cosmic blur and peach out) and is great for an eye look. For one layer only, a finger is fine but I find that it goes patchy when I try to layer with my finger so I am assuming a brush would be good for that but I haven't tried it yet.