What it is:The first sunscreen that addresses the increased risk of sun damage associated with iron left on the skin by tap water.What it is formulated to do:Binds naturally present iron left on the skin as well as iron left by tap water and perspiration. Helps prevent clogged pores and breakouts, a side effect of heavy sunscreens. Antioxidants repair existing damage.What else you need to know:Iron exposed to sunlight becomes unbound and is photo-activated which causes DNA mutations that can lead to skin cancer and increased collagen breakdown.