ASICS Women's Gel-Fit Sana 3 Cross-Trainer Shoe 100% Textile Imported Rubber sole Shaft measures approximately Low-Top" from arch MONO-SOCK Fit System: An elastic internal sleeve which replaces a traditional tongue providing a "sock-like" fit. Seamless Construction: The use of seamless materials reduces the potential for irritation and friction caused by traditional stitches and seams. Rearfoot GEL Cushioning System: Attenuates shock during impact phase and allows for a smooth transition to midstance.