Apply liberally 15 minutes before sun exposure. Reapply: after 80 minutes of swimming or sweating, immediately after towel drying, at least every 2 hours. Sun Protection Measures: Spending time in the sun increases your risk of skin cancer and early skin aging. To decrease the risk, regularly use a sunscreen with a Broad Spectrum SPF of 15 or higher and other sun protection measures including: Limit time in the sun, especially from 10 AM – 2 PM . Wear long-sleeved shirts, pants, hats and sunglasses. Children under 6 months: Ask a doctor.