Sunlight is without a doubt your skin’s worst enemy, bombarding it on a daily basis with the UVA and UVB rays that promote premature aging and skin cancer.
It is important to understand the way your sunscreens work. A chemical-based sunscreen protects the skin against UVA and UVB rays by absorbing them, and a physical-based sunscreens reflect the damaging rays.
Apply regularly and reapply as needed no matter how high your sun protection factors are in your sunscreens.