UPF50+ blocks over 97.5% of the sun uva and uvb radiation. Men sun protection clothing can be used for all type of outdoor activities where sun protection is required. When you purchasing an Ecostinger rash shirt, you are buying state of the art product featuring Italian made fabric, UPF50+ cover, excellent quality and design, breathable keeping your skin cool, fabric is chlorine resistant, provide perfect fit and is comfortable to wear. It is important to know the difference in UV protection factors used to rate clothing. UPF term refer to UV Protection Factor and this is used to rate clothing and swimwear material. SPF term refer to Sunscreen Protection Factor and is used to rate sunscreen products. EPF refer to Eye Protection Factor and is used to rate sunglasses and eye protective wear.