Details La Sportiva G-Summit Mountaineering Boot The G-Summit replaces the G5 Evo as La Sportiva's super-light, super-warm technical mountaineering boot. It's designed for prolonged stays in both static and dynamic winter mountain environments and combines the thermal insulation characteristics of a double shell boot with the lightness and low volume of a single shell boot. The new gold standard in high altitude technical mountaineering, the La Sportiva G-Summit was created to meet two needs: an incredibly warm product for high altitude and polar mountaineering and a remarkably light and precise double boot for expeditions in harsh conditions. Because of the innovative removable liner, the G-Summit can be tailored to your thermal requirements. Weight: 1660g (pair size 42 with liner) Technical mountaineering boot Lightweight and warm Ice-Tech™ tread divided into two parts to maximise performance during climbing and walking Maximum adaptability to different foot shapes to ensure high precision during climbing Quick adjustment lacing thanks to the BOA® Fit System closure system located outside the gaiter and designed for closing and opening with gloves in cold environments Large volume shell to facilitate fit and increase warmth Inner shell made with the patented Core-Wrap™ technology for maximum warmth and lightness Footwear can be resoled entirely (toe and heel) or just the front part only to limit environmental impact Gaiter: Water-repellent stretch abrasion-resistant and heat-taped fabric + water-repellent inner gusset Inner Shell: CORE-WRAP™ with heat-insulating materials and structural reinforcements Lacing system: Boa® Fit System external to the gaiter for quick adjustment of the lower part + hook&loop closure on the upper part with two anchoring points for optimal distribution of tension Footbed: Carbon Z-Therm™ in insulating carbon Insoles: Removable thermal Insoles made of 5 mm insulation material Sole: Vibram® Matterhorn with Impact Brake System lugs Specifications G-Summit Mountaineering Boot