test Sun Facts - Why Do You Need Sunscreen? | Coppertone®

Why do you need sunscreen?

Why do we apply sunscreen?

To help protect our skin from invisible ultraviolet (UV) rays from the sun, namely UVA and UVB rays. UVS rays are short wavelength and do not reach the earth's surface.

UVB 5-10%

UVB rays make up about 5-10% of the rays that reach us:

  • Affects the skin’s outer layer.
  • Are the primary cause of sunburns, skincancer, premature skin aging, and tanning.

UVA 90-95%

UVA rays constitute approximately 90-95% of the rays that reach the Earth:

  • Are weaker than UVB rays, but penetrate deep into the skin’s layers.
  • Can contribute to signs of premature aging, such as wrinkles, as well as tanning.

Understanding the UV index*

The daily UV index forecast is a prediction of the maximum UV strength for the day, which is usually reached in the early afternoon.

*Source US EPA.