The TECNICA Mach Boa HV 120 GW is a high-performance men’s/unisex all-mountain ski boot designed for skiers who demand the strong support of a 120 flex while also needing a roomier, more comfortable fit. The combination of a 103 mm last, BOA® Fit System on the lower shell and two micro-adjustable cuff buckles creates an effective balance of sporty performance, precise adjustment and comfort for full days on the mountain.
The model belongs to the HV – High Volume category and is therefore aimed at skiers who do not have enough room in narrow or medium-volume performance boots. The 103 mm last provides more internal space without sacrificing the sporty character of the boot. A 120 flex index delivers firm support for dynamic skiing and allows experienced skiers to transfer power efficiently to their skis.
Customization is another important part of the design. The C.A.S. PU With Double Quick Instep shell combines C.A.S. Shell technology with a construction that makes getting into the boot easier, while the N.F.S. Comfort Ecodesign With Celliant® liner focuses on comfort and a more environmentally conscious approach to production. The ISO 23223 GripWalk® soles add greater practicality and comfort when walking without skis.
Who are these ski boots for?
The TECNICA Mach Boa HV 120 GW is primarily designed for sporty skiers who need more internal volume but do not want to make a major compromise in support and precision for the sake of comfort. The 120 flex requires an active skiing technique and the ability to take advantage of a firmer boot construction.
The model is particularly suitable for skiers who:
The Mach Boa HV 120 GW is not a soft comfort boot for beginners. It is intended for skiers who need more room around the foot while still being able to take advantage of the strong support provided by a 120 flex.
How do the boots perform on the slopes?
The character of the Mach Boa HV 120 GW is built around the combination of sporty stiffness and the comfort of a high-volume fit. The 120 flex creates a firm platform for actively pressuring the skis, dynamically controlling turns and skiing with greater precision at higher speeds. The skier receives substantial forward support and can transfer energy efficiently into the skis.
At the same time, the 103 mm last provides more room than narrow performance and race-oriented constructions. This is particularly important for skiers with higher-volume feet who want sporty performance but would be limited by excessive pressure or an unsuitable shell shape in narrower boots.
The BOA® Fit System on the lower shell provides a different approach to foot retention than conventional buckles. Combined with two cuff buckles and a 45 mm strap, it creates a system that allows the lower and upper sections of the boot to be adjusted separately.
How to understand the parameters
Flex 120
The TECNICA Mach Boa HV 120 GW has a flex index of 120, matching the performance-oriented character of the model. The boot provides firm support for an experienced skier who can actively pressure the cuff and use the resistance of the shell throughout the turn.
A 120 flex requires a certain level of strength and technical ability. It may be unnecessarily demanding for a lighter or purely recreational skier, while a sporty skier can benefit from the additional stability and support.
Flex indices are not fully standardized between manufacturers. The value of 120 should therefore be considered together with the skier’s weight, strength, technical ability and skiing style.
103 mm last – High Volume
The 103 mm last clearly positions the Mach Boa HV 120 GW among roomier performance ski boots. The HV – High Volume designation refers to the increased internal volume, providing more space for the foot than narrower LV or medium-volume alternatives.
However, High Volume does not mean that the boot should fit loosely. Proper heel and foot retention remain essential, because excessive movement inside the shell reduces control and the precision of power transmission to the skis.
The combination of a 103 mm last and 120 flex is therefore particularly attractive for sporty skiers with higher-volume feet who need additional room while still demanding a firm, performance-oriented construction.
Technologies
BOA®
The BOA® Fit System replaces conventional buckles on the lower shell and allows precise adjustment of shell closure using a dial. The system provides progressive tightening, enabling the skier to fine-tune foot retention without being limited to the individual positions of a traditional buckle.
Combined with two micro-adjustable cuff buckles, it creates a hybrid closure system: BOA® controls the lower section of the boot, while the buckles secure the cuff.
C.A.S. Shell
C.A.S. Shell technology is focused on the ability to customize the shell to the individual foot. The Mach Boa HV 120 GW uses a PU construction specified as C.A.S. PU With Double Quick Instep.
Shell customization can be particularly useful when the basic shape of the boot suits the foot but specific areas require further adjustment. For accurate results, such modifications are best carried out through professional bootfitting.
Grip Walk
The Grip Walk technology on this model is represented by an ISO 23223 GripWalk® sole. Its design is focused on making walking without skis more comfortable and natural while providing more practical contact with the ground when moving around the ski resort.
Ski boots with GripWalk soles must be used with GripWalk-compatible bindings.
NFS (Natural Foot Shape)
NFS (Natural Foot Shape) is associated with a design focused on a more natural and comfortable fit around the foot. In the Mach Boa HV 120 GW, this concept is combined with the N.F.S. Comfort Ecodesign With Celliant® liner and the greater internal volume of the HV construction.
The result is a model that places significant emphasis on comfort and space for the foot alongside its sporty stiffness.
ECO DESIGN
ECO DESIGN reflects Tecnica’s approach to considering environmental aspects during the product design process. In this model, ecodesign principles are also incorporated into the liner construction, which according to the supplied information uses recycled materials among its components.
Performance and comfort are therefore not the only areas considered in the design of the Mach Boa HV 120 GW.
LIFT LOCK BUCKLES
LIFT LOCK BUCKLES technology is designed to make handling the buckles easier when putting the boots on and taking them off. This model uses two micro-adjustable cuff buckles, which work together with the BOA® Fit System to create the complete closure system.
The practical benefit is easier buckle management during entry into the boot, followed by precise adjustment of the upper section.
MATERIAL TRACIABILITY PROGRAM
MATERIAL TRACIABILITY PROGRAM relates to Tecnica’s approach to the traceability of materials used in production. In a model that also incorporates ECO DESIGN principles and recycled materials within the liner, it forms another part of Tecnica’s environmentally oriented approach.
The supplied information does not specify exact percentages of individual materials or the precise scope of the program, so such details should not be assumed.
QUICK INSTEP
QUICK INSTEP technology is designed to make ski boots easier to put on and take off. The technical specification of this model specifically lists Double Quick Instep, which facilitates entry by making the lower shell easier to work with when inserting the foot.
This is particularly practical in a performance boot with a 120 flex: the firmer shell provides the necessary support while skiing, while the construction makes everyday handling of the boot easier.
C.A.S. PU With Double Quick Instep
The foundation of the boot is a C.A.S. PU shell with Double Quick Instep. The PU construction supports the performance-oriented character of the model, C.A.S. provides opportunities for individual shell customization, and Double Quick Instep makes getting into the boot easier.
The overall setup is complemented by a 12.0° forward lean, supporting a sporty stance and active positioning over the skis.
N.F.S. Comfort Ecodesign With Celliant®
The N.F.S. Comfort Ecodesign With Celliant® liner matches the comfort-oriented HV character of the model. It is designed according to ecodesign principles and, based on the supplied information, incorporates recycled materials among its components.
N.F.S. refers to Natural Foot Shape and emphasizes a more comfortable positioning of the foot. The specification also includes Celliant®.
The supplied information does not specify a particular heat-moulding process for this liner, so a specific thermal customization procedure should not be assumed.
BOA® Fit System, two buckles and 45mm Velcro
The closure system combines the BOA® Fit System on the lower shell with two Micro Adjustable Cuff Buckles on the cuff. This allows the skier to adjust foot retention and upper-cuff closure separately.
A 45mm Velcro strap completes the upper section of the cuff and helps create a more secure connection between the lower leg, liner and cuff. Together, these components form a comprehensive closure system suited to the performance-oriented nature of a 120-flex boot.
GripWalk and practicality off the skis
The sole is specified as ISO 23223 GripWalk®. In addition to compatibility with the appropriate binding system, it provides more practical and comfortable walking when heading to the lift, crossing a parking area or moving around the ski resort.
For a performance ski boot, this is a useful combination: on the slopes, the skier gets the firm support of a 120-flex construction, while off the skis, GripWalk provides a more comfortable walking experience.
Performance without an unnecessarily narrow shell
One of the key strengths of the Mach Boa HV 120 GW is the combination of a sporty 120 flex with a roomy 103 mm HV construction. A high-performance ski boot does not automatically have to mean an extremely narrow shell.
For a skier with a higher-volume foot, a correctly selected HV model can provide a much more functional fit than an overly narrow boot that creates excessive pressure. At the same time, the 103 mm construction needs to match the actual shape and volume of the foot – an oversized shell would reduce precision and control.
The manufacturer specifies a weight of 1,850 g in size 265, a Dark Avio colourway, manufacturer code 101868G2383 and product code N24001241.
Why choose the TECNICA Mach Boa HV 120 GW?
The TECNICA Mach Boa HV 120 GW is an excellent choice for sporty skiers who need a roomier ski boot but still demand firm support, precise adjustment and performance appropriate to a 120 flex. The combination of a 103 mm High Volume construction and sporty stiffness is one of the defining strengths of this model.
The BOA® Fit System provides precise adjustment of the lower shell, two micro-adjustable buckles secure the cuff, and the 45mm Velcro strap completes the closure system. C.A.S. Shell adds further customization possibilities, Double Quick Instep makes entry easier, N.F.S. Comfort Ecodesign With Celliant® focuses on comfort, and GripWalk improves practicality away from the skis. The result is a performance-oriented High Volume ski boot that combines strong support and precise control with the additional space and comfort needed by skiers who simply do not fit well in conventional narrower performance boots.
| For whom: | Men's/Unisex |
| System used: | GripWalk |
| Type of ski boots: | All mountain |
| Type of skier: | Sports |
| Ski boot flex index: | 90-120, 120-More |
| Boot Width: | 103 |
Patented BOA® system.
C.A.S. SHELL TECHNOLOGY C.A.S. SHELL C.A.S. SHELL CUSTOMIZATION
RESULT? GREAT OUT-OF-THE-BOX FIT.
As not all feet are shaped the same. C.A.S. Technology allows for the highest level of customization in the market.
• Accurate anatomical shape
• Customizable
- poffers easier and faster heating
- holds custom shape more accurately
• PUNCHING (increase material). Polyether material can be heated and punched in problem fit areas
• GRINDING (increase volume). The shell can be grindabled in problem fit areas.
The new sole-binding system for walking comfort and skiing performance. Increased walking comfort and improved natural roll thanks to curved rubber sole. High-profiled slip-resistant sole. Compatible with all “Grip Walk Ready” bindings.Walking comfort
Better walking grip
No adjustment needed



The anatomical shape of the liner - NFS (Natural Foot Shape) ensures excellent power transmission thanks to new comfortable materials. NFS - ANATOMICALLY SHAPED NFS LINERS.
The ability to obtain regenerated material with homogeneous and known mechanical characteristics will allow a wider use of them in the production on new ski-boots.
Innovative Lift Lock system holds the buckles up and out of the way so they don't catch while getting in or out of your boots.
QR will provide a precise description of all the materials used in the production of the specidic ski-boot, allowing a more precise and consistent regeneration of those materials. This will result in better quality and more possibility to reuse in new ski-boots production.
A shaped plastic component at the instep that is softer than the rest of the shell helps you to step into and out of the ski boot.