What it is Not just a Primer. SOS Primers combine skin care with instant colour correction. The formula improves make-up hold, delivers 24-hour hydration and nourishes & balances skin. Each primer delivers a targeted skin care benefit, discover your SOS Primer match:​ White: Boost glow + increase skin luminosity ​ Green: Diminish & soothe redness + calm skin ​ Pink: Minimise fatigue + boost skin radiance​ Peach: Blur imperfections + even skin tone​ Mattifying: Mattify & blur pores + reduce shine