Whatever topical sunscreen you put on your face is only effective for two hours, so unless you are reapplying throughout the day — and how do you do that while wearing makeup? — you are exposing your skin to sun damage for an extended period of time. Reapplication of sunscreen every two hours is the key to effective sun protection. ZINC IT OVER® Fine + Sheer Sunscreen Facial Mist delivers a convenient, effective and elegant solution to this problem... with NO whitecast!