NARS Light Optimizing Primer SPF 15/PA+++ helps to brighten up your skin as well extending the life of you make-up. Weightless & oil-free it leaves your skin revived & radiant allowing your make-up to look vibrant for longer. It also contains SPF 15 to shield your skin from the sun's harmful rays preventing premature ageing. Directions of Use: Apply to a clean dry face Finish with foundation or use the primer by itself as a daily sunscreen