If it ain’t broke, make it better. The Breakthrough 4 has a redesigned engineered mesh upper for a dynamically crafted fit. This shoe has a no-nonsense underfoot feel paired with EVERUN to tackle all your training needs. Whether it’s track day or back day, go earn your breakthrough. Saucony is among the most respected names in running shoes. We offer a wide range of running and walking shoes, each with the Saucony trademark fit, feel and performance. We've spent years studying the biomechanics of top athletes. Our goal? To develop creatively engineered systems that maximize your performance in your specific activity, allowing you to focus on the activity instead of the equipment. From our studies have come many innovative Saucony concepts. Advanced technologies-like Grid, the first sole-based stability and cushioning system--provide an advantage to athletes of all types.