The clothes included in all of our formulas are made with an special and patented fabric. SolTech+’s UVTR™ (Ultra Violet Transmission Ray) technology provides a safe and treated protective layer that adjusts to atmospheric conditions. The UVTR™ adjusts to the sun’s specific wavelengths. It keeps you warm while allowing the natural UVA and UVB ray to pass through the optimal deflection points. An ergonomic design that allows to sunbathe comfortably in nearly freezing weather, absorb scarce sun rays while practicing exercise outdoors. Speciallu designed to be used in cold climates and in winter seasons.