Day by day, little by little, sun exposure has a cumulative effect. It's the number one case of skin's aging, including wrinkles, uneven skin tone, coarse texture and loss of elasticity. It can also exacerbate acne, rosacea and other skin conditions. While both UVA and UVB light contribute, UVA light is known as the aging ray for its effects on skin. Yet most sunscreens only block UVB light. Rodan + Fields Essentials UVA/UVB Spf 15 offers complete protection. Lightweight and oil-free, it combines UVA blocking agent parsol 1789 (avobenzone) with UVB blockers Oxybenzone and Octinoxate to give you genuine broad spectrum protection. Plus, it’s enriched with vitamin C to absorb skin damaging free radicals. Essentials UVA/UVB Spf 15 is non comedogenic and compatible with any Rodan + Fields regimen. Use it daily and reapply as often as needed to fight aging and the risk of skin cancer. Designed to work under makeup. Won't clog pores. Directions for use: Apply Rodan + Fields Essentials - UVA/UVB Spf 15 in the morning 30 minutes before sun exposure. Reapply liberally throughout the day as needed. From Rodan + Fields, creators of Proactiv ®. Formerly known as Compounds.