The third version of this highly capable entry-level cushioning running shoe..... REARFOOT AND FOREFOOT GEL CUSHIONING SYSTEMS - Attenuates shock during impact and toe-off phases and allows movement in multiple planes as the foot transitions through the gait cycle..... DUOMAX SUPPORT SYSTEM - A dual density midsole system positioned to enhance support and stability positioned sport specifically...... TRUSSTIC SYSTEM - Reduces the weight of the sole unit while retaining the structural integrity of the shoe.....