The 2XU WOMEN'S LONG DISTANCE TRI SINGLET utilizes 2XU's powerful 70D Kinetic speed fabric which is a combination of aero and compression technology. The fabric used is the Swiss air turbulent technology which makes for improved aerodynamics and 2XU's powerful 70D compression fabric for greater endurance and power. With the high filament imported nylon fibers, moisture management and abrasion resistance are maximized. This fabric is also engineered with high quality lycra fiber to enhance the singlets shape retention and fit. This is a revolutionary fabric unmatched in speed and compression performance. Also in this singlet is the Ice-X fabric which uses Xylitol and IR blocking. Xylitol is embedded in the yarn of the fabric to draw heat away from the body and IR blocking inhibits penetration of infrared rays to lower skin temperature by up to 5.4 degrees. The application of Ice-X to polyester/elastic delivers heightened moisture management while high filament yarns and a higher gauge knit are utilized for a lighter, breathable fabric. While this tri singlet does not feature a tri bra it does have a sensor mesh internal support lining so you can unzip the front zipper and cool your body down with no worry. With all these technologies integrated into this singlet, it makes this long distance singlet the perfect balance of speed and comfort.