It’s almost a requirement to wear primer under your makeup in the summertime, otherwise you risk it sliding right off your face before you’ve even left the house. GIVENCHY just put out Mister Mat Mattifying Foundation Primer ($30/.8oz @ sephora.com). Got oily? Then this one is made for you as it has ingredients to help control sebum production. It also contains those light-refracting properties found in a lot of foundations these days, so get to matting!