GEL-FOUNDATION 7 (4E) - TN719 The GEL-Foundation 7 is an exciting update of this high-mileage trainer designed for the overpronator who requires extra stability, without sacrificing a cushioned transition from initial heel strike to propulsion. The GEL-Foundation 7 has a new upper design, visible Dual Density GEL in the rearfoot that helps to slow pronation upon impact.