http://portabrella.uk When buying a portable sun umbrella, you should consider one that protects you from the harmful UV rays. The UPF (Ultraviolet Protection Factor) rating is the standard measurement for the level of sun protection an umbrella offers. The higher the UPF rating, the better the umbrella will protect you from the sun's harmful UV rays. An umbrella with at least UPF 50+ is recommended for optimal sun protection. |