Developed with the new material called Xitanit and the unique 3D-BionicSphere System, the X-BIONIC Fennec Polo shirt turns sweat into energy while providing an excellent, cool feeling, like walking in the shade, partly because the Fennec silvery, glossy fur reflects the heat rays. The Xitanit distributes perspiration optimally over the whole surface of the body. In the end, you body uses evaporation process to regulate the body temperature. This X-BIONIC shirt comes with specially designed Underarms-SweatTraps which prevent dripping sweat and cool very effectively, special knitted sleeve structures that distribute sweat across the skin surface to ensure effective cooling and keep the entrapped air as an insulator when resting. X-BIONIC.