Asolo Women's Tacoma GV Gore-TEX Hiking Boot Leather^Suede Imported lug-sole sole Heel measures approximately 1.25 inches" The meaning of "V", "GV" and "GTX" in the Asolo style names: V stands for a Vibram outsole, GV stands for Gore-Tex lining with a Vibram outsole, and GTX is for a GORE-TEX&reg; lining.