La Roche-Posay Effaclar K + is a daily moisuriser that reduces the appearance of blackheads and mattifys the skin for up to 8 hours from the very first application. Research has shown that, under the effects of external aggressors (pollutant particles, dust...), oily imperfection-prone skin undergoes oxidation, which can trigger a chain reaction, hyperkeratinisation, sebum hyperproduction, oxidation of sebum and impurities present at skin surface, which can lead to the formation of new imperfections. La Roche-Posay Effaclar K + Daily Moisuriser will leave your skin feeling clean & refreshed. Skin instantly looks transformed, smoother-looking texture, pores look unclogged and controlled shine.