- The most advanced performance wear available - The proprietary fabric offers you the highest level of skin protection - EIS shirts are made in the USA from the most advanced fabric technology on the market today - Using this special fabric technology our shirts provide our clients with many outstanding performance features - Offers superior sun protection with the equivalent of SPF 50 IceFil: A cooling factor that is embedded in the fabric reduces body temperature by 5 degrees will provide maximum comfort in humid, hot weather. Movement generates air flow creating a cooling effect. Nanoplex: Microscopic nano particle attached to fabric fibers make these performance features long lasting. Not a fabric finish. Easy Care: Normal wash, quick drying, and no shrinkage. Odor Control: Our special wicking fabric helps control body odor.