... , moderate, high or very high/extreme level of Solar UV radiation. Patent UV Silicone Armband check low, moderate, high or very high ... ,sun protection necessary Very high/Extreme:UVI:8-11+,SPF<30,,avoid exposure to the sun; Tell you when to reapply ... sunscreen on the transparent plastic film covering the UV Silicone Bracelet, when the UV Silicone Bracelet changes color, it's the time ...