Milani Prime Light Strobing Pore Minimizing Face Primer & Make it Last Setting Spray Prime's liquid formula adds a luminous glow as well as preps and primes skin for makeup application. It also minimizes the look of large pores. It can be worn alone or under makeup. Spray Prime is a 3-in-1 primer, correcting and setting spray. it hold for up to 16 hours! lightweight spray locks in makeup.