Under Armour Women's Threadborne Slingflex 100% Textile Imported Rubber sole Shaft measures approximately 2.6" from arch Threadborne upper for a breathable, compression-like fit that delivers lightweight directional strength Knit construction features woven in Dyneema, the world's strongest fiber, for the ultimate in durable flexibility Internal heel counter built with soft padding to provide lightweight protection & structure Padded mesh tongue attached to the footbed by stretchable support wings to increase support & maintain a snug fit throughout the foot Removable, molded Micro G sockliner takes the shape of your foot, offering great cushioning & fit