From the manufacturer:

'the LASH' has a satiny texture that dries quickly and resists clumps, it also gives a pretty, healthy sheen to lashes, drying to a crisp, polished finish. It comes in "the deepest blue/black shade humanly possible". FLEXI-LASTIN added to 'the LASH' makes sure it curls "like crazy". It holds true, yet removes easily with your favorite facial cleanser.