The Saucony Zealot ISO is the third model (after the Hurricane ISO and the Triumph ISO) from ISO series to reach the market: premium running shoes with much more cushioning, sockless fit and incredible lightness.
The Saucony Zealot ISO is an evolution of the well known Cortana 4 and the most important change is a complete new upper. Saucony's ISOFIT™ is basically composed of two elements: a plush inner fit sleeve and a flexible external cage. The floating support cage sits like a saddle over the fit sleeve, cradling the midfoot and moving with the runner’s foot in motion. A more solid heel counter helps providing a better stability.
Another major change takes place in the PWRGRID+™ midsole which has been increased by adding 3mm of foam to both the heel and forefoot providing 20% more cushioning without touching 4 mm offset delivering outstanding comfort and more impact protection.
Outsole has been redesigned adding an extra vertical flex groove to increase flexibility for smooth transition and features iBR+™ in more frequent impact zones to assure better response and durability.