A sturdy and durable boot, the La Sportiva Baruntse is at home when mountaineering at high altitude. . Lightweight, durable double boot for high altitude mountaineering. Polyurethane coated 2 layer insulating outer boot for durable warmth. Low profile, all synthetic outer boot will not absorb moisture. Thermomoldable 7 mm high density insulating EVA liner boot. Cordura coated inner boot with a slip lasted fit. Thermoreflective aluminum layer with antiabrasion, protective nonwoven netting. 6 mm insulating Ibi Thermo insole. 8 9 mm TPU midsole with an SBR air cushion. Vibram Montagna rubber sole for dependency. Giugiaro design lacing hardware.