Ergonomically designed to give you the best aero performance possible in all stages of your triathlon, the 2XU Women's Perform Rear Zipper Singlet also works hard to put comfort high on your agenda. It’s been rebuilt from the ground up for the new season, and now includes multiple technologies that promotes high levels of ventilation. For one, the main Ice X fabric that goes into its construction cools to skin’s surface temperature when you’re really up against it, while also allowing sweat to be wicked away at incredible speed. This is supported by the 3D surface of the SBR vents and Sensor Mesh X, the latter of which is made from hydrophilic yarn to ensure you don’t take on water during the swim stage. Finally, easily accessible rear pockets do a great job of keeping essentials close at hand.