This is our ridge filling base coat. It is a thicker formula that smooths out textured or ridged nails. This base coat is semi-opaque so it will cover nail lines a bit more for more sheer polishes. Use as a base coat before you put on nail polish colors. All of our polishes are cruelty free, vegan and *5-free (free of camphor, toluene, formaldehyde, dibutyl phthalate (DBP) or formaldehyde resins.)