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Advice : Use the foot sizer from SIDAS to help you find the right size
The Concept 10.5 W GW Boa is an all-mountain ski boot for women from the brand Lange.
Designed for advanced skiers, it offers a flex of 105 and a last volume of 103 mm, ensuring an excellent balance between power and comfort. Its BOA® Fit System with H+i1 mechanism provides precise and micro-adjustable fitting, while the 2 aluminium hooks and the 40 mm Powerstrap enhance foot hold for optimal power transmission.
The boot incorporates Dual Core technology, which combines soft and rigid plastics to maximise responsiveness and flex. Its 80% thermoformable Comfort Fit liner guarantees a personalised fit and lasting comfort. The pre-mounted GripWalk® sole makes walking easier with better grip and a natural foot roll.
Its shell made of recycled polyurethane and collar in Lyfran demonstrate an ecological commitment, reducing water consumption and CO2 emissions. The Suspension Blade technology absorbs vibrations for smooth skiing, while Easy Entry & Exit simplifies putting the boot on. Finally, the Flex Adjust allows you to soften the flex by 8% according to your preferences.
The Concept 10.5 W GW Boa is the ideal choice for demanding female skiers seeking performance, comfort, and innovation in a durable boot.

- Thermoformable and 80% customisable Comfort Fit liner
- BOA® Fit System closure with H+i1
- 2 aluminium hooks
- 40 mm Powerstrap
- Pre-mounted GripWalk® soles
Composition:
- Shell: recycled polyurethane
- Cuff: Lyfran
- Liner: Comfort Fit
| EASY ENTRY & EXIT | Passive joints in the lower part of the shell facilitate opening the boot to simplify putting it on and taking it off. |
| SUSPENSION BLADE | An integrated blade between the shell and the cuff ensures a smooth connection between the upper and lower parts of the boot, helping to absorb vibrations and return energy. |
| FLEX ADJUST | An elastomer insert allows adjustment of the boot’s flex, softening it by 8%. |
| BOA® FIT SYSTEM | The BOA® closure system with H+i1 mechanism provides precise, multidirectional, and micro-adjustable fitting around the foot. |
| GRIPWALK® MOUNTED SOLES | GripWalk® soles feature a rubber surface and an upturned toe for a more natural walking motion and improved grip. |
| DUAL CORE | The construction combines soft and rigid plastics to optimise power transmission, responsiveness, and flex of the boot. |
