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 waterproof protection, durable construction, and reliable outsole of the Thyrus GV boot from Asolo® keeps you steady on your feet and bold in your adventures! Ideal for hiking from summer into winter. Mid-cut design provides superior ankle protection.Hardy, 1.6-1.8mm, water-resistant Perwanger leather upper and features a Schoeller® soft shell.GORE-TEX® Extended Comfort Footwear technology offers waterproof protection to ensure feet stay dry and comfortably cool. This non-insulated safeguard is best suited for moderate to warm climates. Plush tongue and collar for added comfort and performance. Heel pull loop for easier on and off.Durable rubber toe cap for added protection.Lite 2 plus insole offers lightweight support and superior underfoot comfort. Molded EVA midsole provides long-lasting cushion for all-day comfort. Redster Asolo/Vibram® Mega Grip is a highly technical outsole, where the balance of the sole has self-cleaning lugs designed for optimum performance on varying types of terrain.Built on the Asoloflex 00 SR last. Made in Romania.