ASICS Women's Gel-Exalt 3 Running Shoe 100% Textile and Synthetic Imported Rubber sole Shaft measures approximately 2.39" from arch Rearfoot GEL Cushioning System: Attenuates shock during impact phase and allows for a smooth transition to midstance. DuoMax Support System: A dual density midsole system positioned to enhance support and stability, positioned sport specifically. SpEVA Midsole Material: Improves bounce back characteristics and decreases midsole breakdown. Trusstic System Technology: Reduces the weight of the sole unit while retaining the structural integrity of the shoe. AHAR Outsole: Acronym for ASICS High Abrasion Rubber. Placed in critical areas of the outsole for exceptional durability.