Closeouts . Updated with a refined lower buckle and a more accommodating shape, La Sportiva's Sideral alpine touring boots offer featherweight performance for ski mountaineering and extended tours. The set-it-and-forget-it Fast Lock closure system converts the boot from ski to walk mode, and a supportive exoskeleton at the back of the cuff ensures precision during descents.

• Ultra-lightweight Grilamid® nylon lower shell
• Vertebra Technology features a carbon-reinforced ergonomic power structure that works like an exoskeleton, providing security and precision in ski mode
• PA 12 Nylon cuff
• Cam Closure System is integrated into the spine
• Pegasus buckles let you fine-tune the lower shell fit and offer secure heel hold
• Waterproof seal under tongue keeps out snow and ice
• EZ Thermo Tour liner with built-in flex zones can be heated and customized to the shape of your foot
• Removable WarmSole polyurethane insole raises your foot up for increased warmth
• LazerGrip dual-density outsole with harder edging platforms in the toe and heel areas for technical rock climbing performance
• Compatible with all types of alpine touring bindings, including the Trab TR2
• Made in Italy
• Alpine touring boots are designed to be used with compatible alpine touring DIN-releasable AT bindings only. AT soles do not fit most downhill bindings and/or could interfere with release mechanisms.
• Ski/Walk mode
• Micro-adjustable
• Power strap
• Recommended use: Alpine Touring
• Binding compatibility: Alpine Touring
• Forward lean: 12, 14 or 16 degrees
• Flex index: 90
• Shell: Grilamid®
• Number of buckles: 2
• Removable liner: Heat moldable
• Removable insole
• Height: 12"
• Weight (pair): 6 lb. 14 oz.
• Made in Italy
• Alpine touring boots are designed to be used with compatible alpine touring DIN-releasable AT bindings only. AT soles do not fit most downhill bindings and/or could interfere with release mechanisms.