Mammut Nordwand TL Mountaineering Boot. Despite a complete range of technical features, this full gaiter boot is the lightest in its category, making it a perfect fit for the Eiger Extreme range. It is the ideal companion for high altitude tours, ice climbing and expeditions, and integrates the patented Base Fit technology to help prevent the foot from slipping in the boot. They newly developed Easy Entry system allows you to put them on quickly and easily, even when wearing thick gloves. The Speed Lace lacing and Power Strap are also glove compatible and ensure the perfect grip in any situation. The full gaiter with a water resistant YKK zip provides protection from snow, water and cold. The invisible technical highlight is the double insulated carbon insole, for which a patent application is pending, creating maximum weight reduction and rigidity combined with optimal insulation.