SPF 15 filters out or blocks 92% of UV(B) rays from the sun.
It allows an individual that would normally burn in 10 minutes to NOT burn for 150 minutes.SPF 30 lasts 300 minutes, or 5 hours.
SPF 90 lasts for 900 minutes, or 15 hours
WHAT IS UVA, UVB, and UVC?
In the 1980s, UVA Radiation was considered safe and used in tanning beds. UVA actually does the most harm. UV = Ultra Violet.
UVB Radiation is prominent in summer months in any earth hemisphere; in summer, that part of the earth is closest to the sun. Sunscreens used to block only UVB, until we found out that UVA is worse for the body.
UVC Raditaion is largely absorbed by the earth's Ozone Layer, one reason that the Ozone Layer is so important. Prolonged UVC exposure is fatal.
Spf For Babies
it is important to apply spf to your children they develop alot of there sun damage in there childhood that is not visible until there adult ages,to much unprotected sun exposure causes faster aging and wrinkling.freckles and sun damage.protect your children
-Downtown pepper
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