3 Step Crystalac is a wide range of colors, they are part of the Soak Off Crystalac semi-permanent category. They can be applied on natural nails, using the base (3Step Crystalac) and Top (3Step Crystalac) but they also have excellent results on gel. The great advantage of this product is that it is soluble, so it can be removed by making a compress with Foil Remover and Easy Remover. 3Step colors are very creamy and opaque even with a single application.