This lightweight garment is composed of two types of high-tech polyester fibers. The inner layer is made of hexa-channeled fibers that sit against the skin and carry moisture away from the body to keep you dry. The outer layer is made of soft, hollow fibers that insulate the body and regulate your temperature. An anti-microbial treatment has been applied to the garment to help keep smell and odor away. Choose from Hibiscus (purple) or Aquamarine.