Enjoy the Universe in Reverse Nail Polish Collection from essie - Canada's nail salon expert. The limited edition collection of 2 nail polish colors for Mercury in Retrograde II, get a psy-kick out of it and happy medium. These two holographic nail polish shades with shimmer like a supernova have multidimensional sparkle.Essie is the go-to nail brand for salon professionals, beauty junkies, industry insiders, celebrities and fashion icons around the world.