ASICS Women's Gel-Hyper Tri 3 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. Seamless Construction: The use of seamless materials reduces the potential for irritation and friction caused by traditional stitches and seams. DuraSponge Outsole: A blown AHAR rubber compound for enhanced cushioning and durability in the forefoot. Perforated Sockliner: Optimizes moisture drainage and improves breathability. Guidance LineMidsole Technology: Vertical flex groove decouples the tooling along the line of progression for enhanced gait efficiency.