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® lining.The TPS 520 GV EVO leather hiking boot by Asolo® has a tough yet comfortable leather design, excellent waterproof protection, and reliable traction that makes it ideal for backpacking, trekking on technical terrains, and long distance hiking.Designed as one-piece of water-resistant 2.6-2.8 mm full grain leather upper for long-lasting durability. Contains a revolutionary Triple Power Structure (T.P.S.) sole designed by Asolo in partnership with Vibram®.GORE-TEX® lining with Extended Comfort Footwear technology offers waterproof protection to ensure feet stay dry and comfortably cool.Rubber toe cap.Easy lace-up design that allows for a more preferred fit.Lite 2 footbed has an anatomic construction for excellent underfoot comfort. Dual density PU midsole provides cushioned support.T.P.S. outsole incorporates three shock absorbers that correspond with the areas of foot that receive highest impact during activity thus providing greater shock absorption, comfort and a more dynamic walking solution.Triple Power Structure Evo Asolo/Vibram® rubber outsole features self-cleaning lugs designed for optimum performance on varying types of terrain.Asoflex 00 MR lasting board.Imported. Measurements: Weight: 2 lbs Shaft: 6 1?2 inProduct measurements were taken using size 11, width D - Medium. Please note that measurements may vary by size.