The Asics GEL-ROCKET 9 offers a GEL™ cushioning technology placed under the heel to absorb impacts, and a flexible EVA midsole that easily adjusts to your foot and its motion. The TRUSSTIC SYSTEM™ components placed in the mid-foot help to control the torsion and provide an optimal support to the foot during every movement and every change in direction. The EVA sockliner is removable for comfort of those using orthopedic insoles.