Sun Bum's Mineral SPF 30 Sunscreen Face Lotion protects the skin from damaging UVA and UVB rays without environmentally harmful chemicals. This lightweight zinc-based formula primes the skin and leaves it with a non-greasy matte finish.Reapply this hydrating sunscreen every 40 minutes after swimming or sweating, or at least every two hours.Learn about the importance (and anti-aging benefit) of using sunscreen on our blog!