Reebok Zig Pulse Mens Shoes-Echo Blue/Ultra Marine/Kiwi GreenEcho Blue/Ultra Marine/Kiwi Green/White introduces new technology to improve your workouts with the ZigTech runners.Reebokis a uniquely formed zig-zag shaped foam bottom unit designed to make the athlete more fuel efficient so they can do more with less effort- 'Go Longer'.Its unique shape is based on acoustic foam sound absorption technology and absorbs energy at multiple angles. The movement of each node (or 'Zig') is independent, yet connected to the nodes around it. It is designed to absorb energy on impact and reduce vibration creating a soft, quieter, more efficient ride that requires less muscle activation.At heel strike the 'zig's' both shear and compress, absorbing energy and minimizing energy-draining vibration. That energy is stored and returned to the athlete in a quiet, smooth, spring-like effect.Reebok shoesare up to 20% more efficient than a traditionalrunning shoe.ZigTech reduces muscle activation so you can 'Go Longer'. Up to 13% less in gluteus maximus, 6% in your hamstrings, and 21% in your shins.People who love this item would also buy Reebok ZigPulse Men's Shoe Yellow/Black/Red Go Outside Wide Shoes-Blue.