Running Shoes Series: Saucony Everun Infographic

Saucony Everun Technology

Written by: Adam Bible

Illustrations by: Allie Surdovel


Running is, for many of us, not the easiest of sports. The aerobic effort can be intense and the pounding on our joints taxing. That's why proper gear is essential and why runners have long flocked to Saucony shoes to help make their jogs more joyful than jarring. Their GRID™ (Ground Reaction Inertia Device) cushioning technology—first introduced in 1991—and later the PowerGrid™ upgrade, provided a durable, lightweight shoe that could better absorb shock.


But their newest innovation, EVERUN™, transforms the way current shoes are constructed. With this technology, Saucony has created a new foam formula that uses steam to fuse thousands of springy thermoplastic polyurethane (TPU) beads together for a flexible and consistent feel as you run.


In a unique move, they have also redesigned the sole layers by creating a new component called “topsole." This is basically an extra 3 millimeter layer of cushioning that sits closer to the bottom of your foot for an even distribution of pressure. The new EVERUN™ cushioning is also placed in the heel to add to the responsive and bouncy ride.


Saucony can even adjust the type of polymer used in the process of making the foam along with changing the molding and the shoe assembly to hone the design and better serve all types of runners and surfaces. For example, to gain a softer and cloud-like feel, they can make the whole midsole out of EVERUN™ to cater to athletes searching for super cushioning.


Active Adaptation

The unique properties of EVERUN™ mean that each stride and every landing has a consistent feel that they call "continuous cushioning." By creating a top sole made out of the foam, the constant pounding your foot takes is more evenly spread out over the whole foot. That makes for softer and smoother heel strikes and less forefoot pressure, resulting in more protection during take offs.


Super Resilient

The TPU foam they recently created is resistant to fluctuations in temperatures—cold days can make the foam harder, warm days too soft—and will last three times longer than the usual EVA (ethylene vinyl acetate) foam blends used for running shoes. It's also twice as flexible as normal cushioning and will move more realistically with your foot through all parts of your stride.


Bounce Back

How much energy is returned to your legs after each stride is an important factor in determining the comfort and efficiency of a running shoe. Tests show that EVERUN™ can deliver 83 percent more energy back to the runner as they jog, which makes for a livelier and more reactive feel, especially at the end of the run as your legs fatigue.