Having used Sensai Sensai Mascara 38C Separating & Lengthening 01 Black about 5 years ago for3 years religiously- it stayed on through 24h ambulance shifts, I was exited to try this one too. Having not used any mascara for a few years I thought this one would have similar wonderful wear. Unfortunately it starts crumbling and leaving tiny speckles under my eyes and on my upper lids within hours of wear. Could be that me wearing glasses and a medical mask at work makes it crumble off easier, but years ago the other one did nothing of the sorts. I am a bit disappointed. It does make my lashes look nice and lengthened at first though and gives them more curl too. Also a plus is that it comes off easy with miscellar water or warm water.