To give a break to the 26 bones that squash and squeeze in your foot while you're riding, we have patented a unique X-Comfort Zone. It's a small section inside the shoe that can expand up to 5 millimeters to prevent numbness. Without any extension system, the toes end up on top of each other and tend to get numb. Thanks to this innovation, you won't have to end your ride before you're done ever again. To help you make quick transitions in competition, we've designed a long pull strap at the back for easy on and the 2 velcros on top take no time to close. For ventilation, we use an Ergo Air Stream sole that keep your feet dry during the whole competition, right after swimming up until you reach the end of the ride. Ready to go?. Features. • Technology: Integrated X-Comfort Zone technology with better stretch-New Ergo Air Stream co injected for great stiffness. • Upper: Extremetly well ventilated upper and quick drying. • Insole: Breathable, ventilated.