ZO Skin Health's Sunscreen Powder utilizes physical sunscreen ingredients like zinc oxide to block UVA and UVB rays, along with antioxidants to protect from free radical and HEV light damage, and contains oil-absorbing properties with light-reflecting particles to provide a luminous, matte finish that also controls shine and can be applied over makeup. Its key function is to provide convenient, on-the-go sun protection and shine control while serving as a touch-up product throughout the day.