•The GEL-ADVANCE 4 continues to push the boundaries of technology by becoming even lighter than its predecessor. •Rearfoot GEL provides cushioning and shock absorption and the combination of the mesh/synthetic leather upper Solyte Midsole and revolutionary PU outsole make it unbelievably light. •The GEL-ADVANCE 4 also comes complete with a combination of screw-in metal and PU soft studs. •SOLYTE MIDSOLE MATERIAL - A lighter weight midsole compound than ASICS' standard EVA and SpEVA. Also features enhanced cushioning and durability. •REARFOOT GEL CUSHIONING SYSTEM - Attenuates shock during impact phase and allows for a smooth transition to midstance. •TRUSSTIC SYSTEM - Reduces the weight of the sole unit while retaining the structural integrity of the shoe. •SOLYTE 55 - Employs 55 degree Solyte lasting material for a soft but stable platform feel. •REMOVABLE EVA SOCKLINER - A sockliner which can be removed to accommodate a medical orthotic. •DUOMAX SUPPORT SYSTEM - A dual density midsole system positioned to enhance support and stability positioned sport specifically. •Injection PU OUTSOLE - Lighter than traditional rubber outsoles and gives a more supportive base. •EX-GRIP SOCKLINER - A special tacky PU print on the top of the the sockliner which prevents the foot from slipping inside the shoe. •TRIPLE OPTION - Flexibility for varied spike configuration. •P-GUARD - An abrasion and tear resistant synthetic material for increased upper durability.