The G2 Evo is La Sportiva's ultimate thermal gaiter boot built for extreme mountaineering in low temperatures. It's heavily insulated with a felt-insulated inner boot and removable foam liner, and the Cordura+ stretchy gaiter protects the insulation with rugged abrasion- and water-resistance, and Ultrasonic Welding gives the gaiter a seamless design for greater weather protection. The inner boot is also made of Cordura+ for longlasting durability, and it's four-layer constructed with felt insulation and an aluminum layer that bounces body heat back. A removable liner insulated with EVA adds even more warmth, and it has a flex zone to ensure easy mobility up the mountain. Underfoot, the G2 Evo has a carbon midsole to maintain torsional rigidity without much weight. Vibram's rubber sole ensures traction worthy of the Matterhorn, and it's compatible with automatic crampons.