Description of Boreal G1 Lite Mountaineering Boots Good for intense to extremely cold conditions. High mountain and altitude climbing. Long alpine ascents. Features: 2180 gr. pair. Size 7 u.k. Lightweight double boot consisting of an outer boot and a removable inner boot Waterproof and reinforced one piece Dynatec, with Lorica, Carbonglass and Neoprene Highly abrasion resistant Cordura liner with Sympatex® membrane 6 mm EVA 1.4 mm Neoprene insole for insulation Anti-slip heel lugs for precise inner boot location Slip lasted removable bootie of Lorica and highly abrasion resistant Cordura exterior with Sympatex® membrane and interior of Boreal Dry- Line® Thermo-sealed seams Triple internal Thinsulate® layers (no adhesives used) surround the foot, guaranteeing maximum protection with no cold spots 1.4 mm Neoprene insole for insulation, with anti-slip heel lugs for precise inner boot location 4 piece Neoprene Velcro-elastic closure for thermal insulation Special Velcro-elastic adjustment on heel Boreal Mount FDS-3 sole with triple density rubber Plus 10 mm EVA-Pro midsole for shock absorption and thermal insulation Technical Crampon compatible Boreal PBG-680 with lateral reinforcements for superior torsion control Specially isolated by three layers: Radoma, triple layer Thinsulate® and Neoprene