This water-based moisturizer provides all-day hydration, SPF 20+ broad-spectrum sun protection and a light, luminous shimmer. Mica reflects light to illuminate the skin, diminish dark spots, and promote a healthy, youthful glow. As with all Becca moisturizers, it also firms and softens the skin while nourishing your complexion with vitamins A, B, D and E, which aid in collagen renewal, help to bind moisture, protect from pollutants and fights free radicals. Opal is a very light shade with subtle shimmer.