Engineered mesh uppers will encase each foot in breathable comfort. Lightweight and highly breathable for all-temperature comfort, the mesh acts as a lightweight second skin, providing a supportive and comfortable fit. Its perforated construction allows air to fully permeate the entire upper, letting your feet breathe when the temperature starts to rise or your training session heats up. The upper construction also features foot-shape technology which allows the toes to be relaxed within the shoe. It allows them to spread out naturally with the big toe remaining in a straight position for additional comfort, speed and stability. An updated heel construction ensures a secure and comfortable fit so you can go further for longer. Completing the upper is a lacing system that locks down the midfoot to reduce in-shoe slippage so you can enjoy distraction-free strides.