ASICS Women's Gel-Quantum 180 2 Running Shoe 100% Textile and Synthetic Imported Rubber sole Shaft measures approximately Low-Top" from arch Rearfoot and Forefoot GEL Cushioning Systems: Attenuates shock during impact and toe-off phases, and allows movement in multiple planes as the foot transitions through the gait cycle. Seamless Construction: The use of seamless materials reduces the potential for irritation and friction caused by traditional stitches and seams. Trusstic System Technology: Reduces the weight of the sole unit while retaining the structural integrity of the shoe. Solyte Midsole Material: A lighter weight midsole compound than ASICS' standard EVA and SpEVA. Also features enhanced cushioning and durability. ComforDry X-40 Sockliner: This premium sockliner features higher rebound properties while providing excellent moisture management and a high-level of breathability.