SPF 15 product blocks about 94% of UVB rays; SPF 30 blocks 97% and SPF 45 blocks about 89%. Nothing is 100%.

SPF 15 product blocks about 94% of UVB rays; SPF 30 blocks 97%; and an SPF 45 blocks about 98%. Nothing is 100% http://ow.ly/Brae3

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