The Ordinary's Mineral UV Filters SPF 30 with Antioxidants offers sun protection along with antioxidant, hydration, and anti-irritant support. The Mineral UV Filter formulas avoid the use of any nanoparticles. Instead, a refined dispersion of micronized ZnO and TiO2 in flexible, high-volatility, non-comedogenic silicones allows the formulations to remain extremely lightweight by optimizing the amount of blocking agents. Our formulation uses mainly ZnO for its protective effects (because in addition to reflecting/refracting light, ZnO is actually also able to absorb UV rays without creating oxygen radicals) and the supporting TiO2 that it contains is only in rutile form (no anatase form of TiO2 is used at all since it's an aggressive producer of free radicals).
Apply to face liberally and evenly 15 to 20 minutes before UV exposure. If continued UV exposure is expected, to maintain protection, reapply at least every 2 hours or after material water exposure, towel-drying, swimming or extensive perspiration.