How to choose the UV protection level of beach umbrella

Update:16-04-2019
Summary:

UPF measurements of fabrics are generally tested by spe […]

UPF measurements of fabrics are generally tested by spectrometer equipment and are not tested using human subjects. The UPF rate indicates how much of the sun's UV radiation is absorbed by the fabric. For example, a fabric with a UPF rating of 50 only allows 1/50th of the sun's UV radiation to pass through it. This means that this fabric will reduce your skin's UV radiation exposure by 50 times (98% UV block) in areas where the skin is protected by the fabric.

Protection Category

UPF Range

UPF Values Allowed on Labels

Approximate % UV Blocked

Good UV Protection

15 - 24

15 and 20

93.3% - 95.8%

Very Good UV Protection

25 - 39

25, 30 and 35

96.0% - 97.4%

Excellent UV Protection

40 - 50+

40, 45, 50 and 50+

97.5% - 98.0%

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