ASICS Men's Gel-Excite 4 Running Shoe 100% Synthetic Imported Rubber sole Shaft measures approximately Low-Top" from arch Rearfoot GEL Cushioning System: Attenuates shock during impact phase and allows for a smooth transition to midstance. Removable Sockliner: A sockliner which can be removed to accommodate a medical orthotic. AHAR Outsole: Acronym for ASICS High Abrasion Rubber. Placed in critical areas of the outsole for exceptional durability. AHAR Outsole: Acronym for ASICS High Abrasion Rubber. Placed in critical areas of the outsole for exceptional durability.