ASICS Women's Gel-Quickwalk 3 Walking Shoe 100% Synthetic Imported Rubber sole Shaft measures approximately 2.4" from arch Rearfoot GEL Cushioning System: Attenuates shock during impact phase and allows for a smooth transition to midstance. AHAR Outsole: Acronym for ASICS High Abrasion Rubber. Placed in critical areas of the outsole for exceptional durability.