Sun safety is essential to maintain the health of your complexion. The World Health Organization states: Up to 80% of solar UV radiation can penetrate light cloud cover. Haze in the atmosphere can even increase UV radiation exposure. Ground reflection: grass, soil and water reflect less than 10% of UV radiation; fresh snow reflects as much as 80%; dry beach sand about 15% and sea foam about 25%. As UV radiation can neither be seen nor felt, it is important to take prompt, appropriate, protective action on a daily basis.