Equi In Style Sun Shirts utilize the most advanced performance technology available in their proprietary fabric which offers the highest level of skin protection. The EIS Cool Shirt is proudly made in the USA. Features include: UPF 50 Sun Protection. IceFil which is a cooling factor that is embedded in the fabric to reduce body temperature by 5 degrees to provide maximum comfort in humid, hot weather. Your body movement generates air flow creating a cooling effect. Special wicking fabric also helps to keep body odor under control.