Look for sunglasses with an eye-sun protection factor (E-SPF) between 25 and 50, he said.

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They weren't cancerous, but she began using a sun-protection factor of 45 as part of her daily routine.

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The result is a material that is not only waterproof but is able to block out UV radiation from the sun to such an extent that it would rate a Ultraviolet Protection Factor (UPF) of 101.15 if the chart went that high.

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