Here's what other sites are saying:
When you require a lightweight, precise, powerful boot for your next ski-mountaineering adventure, look no further than the Sideral Alpine Touring Boot from La Sportiva. The Sideral is made with a Grilamid shell that is extremely lightweight. To help maintain the lightness but improve power and skiability, La Sportiva added carbon fiber reinforcements throughout the shell of the boot. Since long days in boots tend to be the norm in the mountains, a thermo-moldable Palau liner mitigates any chafing or hot spots before they become a problem. To keep your feet from freezing during alternating belay pitches, La Sportiva put in a removable WarmSole insert that prevents the loss of heat through the bottom of the boot. When speed matters, you'll appreciate the ease of the Fast-Lock System and the QuickBuckle upper that allows you to switch from ski to walk mode with the flick of a switch. When in walk mode, these boots provide a hefty 68-degree cuff rotation, perfect for sections of more technical climbing. A LazerGrip Outsole with dual-density rubber positions climbing rubber where you need it for grip, and softer, shock-absorbing rubber under your heel and ball of your foot to allow you to go for longer.
CLOSEOUTS . La Sportivaand#39;s Sideral alpine touring boots are a featherweight AT boot for ski mountaineering and extended tours. The set-it-and-forget-it Fast Lock System converts the boot from ski to walk mode, and a supportive exoskeleton at the back of the cuff ensures precision during descents. Available Colors: RED. Sizes: 26, 26.5, 27, 27.5, 28, 28.5, 30.5.
- Sierra Trading Post
La Sportiva's Sideral Boots are the perfect all-around ski mountaineering boot that is also perfectly suited for demanding speed touring.
Transition from ski- to walk-mode in one super-fast movement when you use La Sportiva's Sideral Boot. The exoskeleton-like Vertebra Technology is the backbone of the cuff construction offering power and precision while downhill skiing, the flex-hinge system in both the boot tongue and its thermo-moldable liner gives you freedom of movement that translates directly into comfort.
- Mountain Gear
The Sideral is the perfect all-around ski mountaineering boot for fast paced tours and demanding climbing on both ice and rock.Features:G-Shell ultra-lightweight nylon polymer Grilamid allows us to reduce the thickness of the lower shell wall to half that of other ski boot plastics without sacrificing stiffness or power.Cuff: amazing 68 degree range of motion for maximum agility on steep climbs and switchbacks and long strides on flat terrain.Fast Lock System: upper QuickBuckle set-it-and-forget-it quick release buckle system acts as an all-in-one speed closure and cuff tension regulation sytem that converts the boot quickly and easily from ski mode to walk mode for lightning fast transitions.Vertebra Technology: Carbon Reinforced Polymer (CRP) - PA12 Nylon and Carbon Fiber hardwearing ergonomic power structure that works like an exoskeleton (patent pending). It is the backbone of the cuff construction and guarantees maximum security and precision during downhill ski mode. No need for a stiff tongue, the power comes from the Vertebra when it is locked out in downhill mode.Cam Closure System: A (patent pending) quick-release lock mechanism integrated to the Vertebra Technology spine comprising a springloaded cam activated by the QuickBuckleTech Specs:Weight: 1180 g / 41.6 oz (size 27)Shell: GrilamidCuff: PA12 NylonVertebra: Carbon Reinforced Polymer - PA 12 Nylon and Carbon FiberTongue: PEBAXLiner: Palau thermo-moldable EVAPositions: 3 forward lean settings (12, 14, 16)Binding Compatibility: Tech bindings only - not AT Touring (ISO DIN 9523) compatibleSole: La Sportiva LazerGrip by Davos
- Second Ascent