The ultimate sidekick for Mac's #1 foundation. Start your customized complexion routine with Mac's must-have mattifying base. Achieve complexion perfection with this matte primer that delivers an all-day reduction in the appearance of pores, controls oil and shine up to 12 hours, promises a lasting improvement in skin texture and improves the wear of makeup for up to 12 hours. The transformative gel-to-powder formula feels weightless with a velvety, powder-soft finish. This oil-free, perspiration- and humidity-resistant primer is formulated with a shine-controlling Oil-Check Complex and infused with lactobionic acid (Pha), algae extract and witch hazel.