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NanbeiUV Sun caps offer your child great protection from the sun. With a long brim and neck protection flap for maximum coverage on a hot day. Use alone for school or days out or team it with any of theNanbei UV sun suits for even greater protection from the UV rays of the sun.Names: UV Sun Cap, UV Hat, UV Cap, Lycra Cap, Lycra Hat, Rash Guard, UV UPF50+ Sun Hat, Sun Hat, Sun Cap, UV protection cap, UV visor, Lycra hat, Lycra cap, Lycra visor, Solar cap, Solar hat Fabric: Polycotton/LycraFeatures 50+ UPF ultra violet protection. Ideal for all wet or dry summer activities. Colourways Baloon Blue Ocean Pink What does UPF50+ mean? This is the maximum Ultraviolet Protection Factor accorded to sun protection clothing by Australian, New Zealand and US Government rating agencies. The UPF rating indicates how much Ultraviolet Radiation is absorbed by the fabric. For example a fabric with a UPF Rating of 50 only allows 1/50th of the hazardous ultraviolet radiation falling on the surface of the fabric to pass through it - or expressed another way, the fabric blocks 98% of the sun's harmful UV Rays. This means that, where it is protected by the fabric, the fabric will reduce your skin's exposure to ultraviolet radiation by twenty times.