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UPF (ultraviolet protection factor) represents the ratio of sunburn-causing UV without and with the protection of the fabric, similar to SPF (sun protection factor) ratings for sunscreen. While standard summer fabrics have UPF ~6, sun protective clothing typically has UPF ~30, which means that only 1 out of ~30 units of UV will pass through (~3%).
A UV index reading of 6 to 7 means high risk of harm from unprotected sun exposure. Protection against skin and eye damage is needed. Reduce time in the sun between 10 a.m. and 4 p.m. If outdoors, seek shade and wear sun-protective clothing, a wide-brimmed hat, and UV-blocking sunglasses.
The shade of each umbrella is extended in the four corners, with a total area covered of 143,000 square meters. These umbrellas are aimed to protect worshipers from the heat of the sun during prayer, as well as from the risk of slipping and falling in the event of rain. Similar structures are built at the square of the mosques worldwide.
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