HeatGear® fabric, with all the benefits of UA Compression, comfortable enough to be worn all day. 4-way stretch fabrication allows greater mobility in any direction. Moisture Transport System wicks sweat away from the body. Anti-Odor technology prevents the growth of odor causing microbes. UPF 30+ protects your skin from the sun"s harmful rays. Smooth, chafe-free flatlock seam construction. 5.0 oz. Polyester/Elastane. Imported. Thor, Iron Man, Spider-Man are property of ©Marvel. Superman is property of ©DC Comics.