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 Nucleon GV boot by Asolo keeps you supported and comfortable while you hit the trails. Ideal for light hiking and summer thru winter walking. 1.6-1.8mm water-resistant suede and Schoeller soft shell upper. Classic lace-up closure. GORE-TEX Extended Comfort lining is waterproof and breathable for a drier, more comfortable foot environment. Lite 2 insole offers lightweight support and underfoot comfort. Supportive single density EVA midsole. Rubber toe cap. Asolo/Vibram Megagrip highly technical sole. Outsole has self-cleaning lugs designed for optimum performance on varying types of terrain. Imported. Measurements: Weight: 14 oz Product measurements were taken using size US Men's 11.5, width D - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.