• Apply liberally 15 minutes before sun exposure • Reapply: • after 40 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 this risk, regularly use a sunscreen with a Broad Spectrum SPF value of 15 or higher and other sun protection measures including: limit time in the sun, especially from 10 a.m.-2 p.m. • wear long-sleeved shirts, pants, hats, and sunglasses • children under 6 months of age: ask a doctor