Day-to-day sun exposure requires the same precautions as an afternoon spent poolside. Anti-aging City Sunscreen Serum SPF 30, a super lightweight serum, fulfills that everyday need. Both a moisturizer and a broad-spectrum SPF 30, it fights the signs of premature aging and protects against future UV damage. Built for year-round use, it’s a great primer for the rest of your daily beauty regimen.