Drafting off the design of the performance driven GEL-QUANTUM 360 silhouette, the ASICS Men's Gel-Quantum 90 Running Shoes fuse a technical design that's layered with comfortable cushioning. Breathable mesh upper E. V. A midsole Rearfoot GEL technology improves impact absorption Pull tab Lace-up closure Implementing a mesh upper that wraps the forefoot with excellent support and airflow, the ASICS Men's Gel-Quantum 90 Running Shoes are also complemented with bold GEL branding on the heel. Created with a balanced blend of support and long-lasting comfort, these shoes feature the injection E. V. A technology in the midsole for a more energised response, while the GEL technology cushioning in the heel helps attenuate shock from impact. Supplying advanced comfort with a technical design, the Gel-Quantum 90 shoes continue to redefine the limits of cushioning for performance driven offerings. How to calculate your size: Stand on an even surface with your heels against a wall Place a ruler flat on the floor beside the inside of your foot from heel to toe Place an object with a flat edge across the tip of your longest toe Your foot length measurement (in cm) is where the flat edge crosses the ruler.