Mat smoothing base coat is an invisible nail primer which smoothes and erases any irregularities of the nail. It is the ideal base to take care of sensitive, weakened and damaged nails before applying a coloured serum varnish. The most innovative and advanced clean formula with proven effectiveness* that protects and restores healthy nails thanks to a trio of targeted active ingredients [silicon, keratin and calcium] combined for the first time with natural extracts of chestnut, hibiscus, samphire and Centella Asiatica. These actives are known to promote the regeneration of the nail matrix and improve its protection against external aggressions * User Test satisfaction results available on kurebazaar.com