Sun protection factor by Elta provides an important barrier between you and harmful rays. Use a sun care product that combines chemical sunscreens for adequate blocking of UV-B rays, plus physical blocks, especially zinc oxide, for broad spectrum UV-A protection. Apply on a daily basis. Sunscreens are chemicals that absorb the ultraviolet (UV) rays. Sunscreens mostly protect against UV-B rays. Allow Elta to provide you with the best sun protection factor.