The updated Sonic 4 Balance is designed to be as springy as it is cushioned. We’ve kept our Optivibe™ cushioning to dampen uncomfortable vibrations without sacrificing energy return, so you get a really responsive ride. Now with a softer mesh and inner booty construction, this shoe is revving to go the extra mile.
Features • Reduce vibrations: Optivibe™ cushioning helps limit vibrations with the aim of decreasing muscle fatigue, while continuing to deliver a responsive ride • Responsive ride: Delivers that bouncy, springy feeling each time you push off the ground • Balanced transition: The Geometric Decoupling axis is centered to deliver a balanced, effortless forward transition from contact to propulsion • Optivibe™: A combination of foams, one to dampen, one to propel. This was developed to reduce vibration upon foot strike aimed to decrease muscle fatigue without affecting the overall ride • Geometric Decoupling™: Geometric Decoupling™ works with the foot to provide guidance for an effortless and efficient heel-to-toe transition • Internal SensiFit™: Invisible from the outside, the Sensifit cradles the foot from the midsole to the lacing system, providing a secure, snug, and virtually customized fit all around the foot
