I have nearly no lashes so all those big clumpy mascara wants don't work on my eyes as they are just too big to grab onto my non-existent lashes. This product has the skinniest tiniest brush that can grab all the tiny hairs. It has little fibres and is smudge proof. I bought mine in Seoul and it was about 10$, I think. This product and dejavu Fibrewig mascara are my favourites. Sometimes I use both to get the full effect of my sad, asian monolid eyelashes.