Understanding UV Rays

  • 80% of all UV rays can penetrate clouds
  • 60% of all UV rays occur between 10am and 2pm
  • 25% of all UV rays reflect off of water
  • 17% of UV rays reflect off of sand
  • Shade can reduce UV exposure by 50% or more
Sunscreen combines ingredients to protect the skin from the sun’s ultraviolet (UV) radiation.  There are two types of UV rays that you need to protect against:
  • Ultraviolet (UV) A: Longer wavelength causing lasting skin damage, skin aging and can cause skin cancer.
  • Ultraviolet (UV) B:  Shorter wavelength causing burning, skin damage and can cause skin cancer.
Broad spectrum formulas protect against both UVA and UVB rays. 
Sun Protection Factor (SPF) measures a sunscreen’s ability to protect the skin from UVB rays. For instance, an SPF 15 will protect your skin from burning up to 15 times longer that it would take for your skin to burn without SPF protection.
By using sunscreen on a regular basis, you give your skin a break from fighting off UV rays and enable it to begin healing from previous skin damage.
 
Source:  Skin Cancer Foundation