Lately it has been extremely hot outside and that means that pencil eyeliner has no chance at staying put, so I've been relying on gel eyeliner. I got this Cailyn gel eyeliner in my June Ipsy bag, which is a monthly beauty box subscription, and I fell in love with not only the metallic purple hue (amazing for black eyes), but the long lasting power it has. It stayed intact through a long concert in a very sunny Central Park. At the end of the show my sweat had melted all my face makeup off, but my eyes were still winged, which means success! Also, it comes with a good quality brush inside of the packaging, which makes it perfect for traveling. 