Details Boreal G1 Lite Mountaineering Boot The Boreal G1 Lite is a high altitude mountaineering boot for long alpine routes in the greater ranges or winter alpine climbing. It is ideal for altitudes of 6000-7000m and even above, and is just short of the maximum warmth boots that would allow you to climb in the greater ranges in the winter. Warmer even than any plastic boot out there, it also offers excellent comfort as the fabric upper allows for more flex and a good fit. This fit makes it better for more technical climbing. Weight: 2290g (pair size UK 7) Incredibly warm boot for high altitude or winter alpine mountaineering  Double boot with an outer shell and removable inner bootie Upper: Lightweight, highly abrasion resistant and water-resistant Teramida with Lorica and ceramic reinforced stretch Cordura Bi-flex system for superior ankle articulation and comfort 6mm EVA insulation layer and Cordura-Sympatex waterproof breathable lining 1.4mm neoprene insole for insulation Integral elasticated snow skirt Lightweight TPU rand for durability Inner Bootie: Made from very lightweight and extremely insulative triple layer laminate Heat reflective aluminium film bonded to a durable polyurethane outer layer and insulative EVA foam on the internal side Boreal Dry- Line® waterproof breathable lining with fully thermosealed seams Triple Thinsulate® layers (no adhesives used) suround the foot guaranteeing maximum thermal protection with no cold spots The sole of the bootie is covered with a durable textured TPU surface Easy adjust 'Tanka' and velcro closure system with adjustable fit around the instep area Midsole: Ultralight Boreal PBG-680 carbon composite midsole with lateral torsion control Unique Thinsulate lining for superior underfoot thermal insulation Sole: Vibram Teton rubber outsole with dual density EVA and PU shock absorbing layers Differential hardness TPU toe and heel pieces for automatic crampons Specifications G1-Lite Mountaineering Boot