ZO Skin Health’s Smart Tone Broad Spectrum SPF 50 is a non-greasy, quick-drying sunscreen with a sheer matte finish that offers powerful broad-spectrum protection against UVA and UVB rays. Engineered with our exclusive 12-hour time-release ZOX12® complex, this water and perspiration-resistant sunscreen helps shield from harmful infrared (IR-A) rays, delivers superior protection during outdoor activities, and hydrates the skin to prevent dryness.