The SALOMON S/PRO 100 are men's/unisex performance all-mountain ski boots with a 100 flex and an adjustable shell width of 100–106 mm, designed for skiers looking for a balanced combination of precise ski control, solid support and all-day comfort. Their character sits between softer recreational models and significantly stiffer high-performance boots – they provide enough support for athletic skiing without becoming unnecessarily demanding.

One of the key features of the model is Custom Shell technology, which allows the shell construction to be individually adapted. The base width is 100 mm, while the supplied specifications indicate an adjustment range of 100–106 mm. The S/PRO 100 can therefore provide a precise performance fit while allowing additional space to be created where the individual foot needs it.

Comfort and stability are further supported by the My Custom Fit 3D Performance liner together with Seamless Liner technology. Their purpose is to wrap the foot securely, reduce problematic pressure points and create a stable connection between the foot and the shell. The result is a versatile performance ski boot for skiers who want to combine control, comfort and greater potential for individual fit adjustment.

Who are these ski boots for?

The SALOMON S/PRO 100 are men's/unisex all-mountain ski boots for performance-oriented skiers who want a firmer and more precise construction than basic recreational models but do not need the high flex associated with the stiffest performance boots.

A 100 flex provides a well-balanced level of support for athletic skiing. It is firm enough for active ski control while remaining more accessible than significantly stiffer constructions. Another important advantage is the adaptable shell, which makes it possible to respond more effectively to the individual anatomy of the foot.

This model is suitable for skiers who:

• ski actively and with a performance-oriented style
• have good skiing technique
• are looking for versatile all-mountain ski boots
• prefer a medium-stiff 100 flex
• want to combine precision with all-day comfort
• need the option of shell customization
• want a 100 mm base width with the possibility of creating additional space
• expect stable foot positioning
• require efficient transfer of movements to the skis
• appreciate a construction focused on reducing pressure points
• prefer a four-buckle closure
• do not want an overly soft or extremely stiff performance boot

How do the ski boots perform on snow?

The SALOMON S/PRO 100 are focused on balanced performance skiing with a strong combination of precision, control and comfort. The 100 flex provides solid support when pressure is applied forward against the cuff, but it is not so stiff that it demands the strength and technique associated with significantly firmer performance or race-oriented models.

With the foot correctly positioned, the base 100 mm construction creates good contact between the foot and the shell. This helps transfer the skier's movements to the skis and supports precise turn control. The ability to customize the shell through Custom Shell is particularly useful when the individual foot requires more room in specific areas.

The 100 flex also provides enough support for dynamic skiing and higher loads without turning the boot into an excessively demanding construction. This balance makes the S/PRO 100 a versatile choice for performance-oriented all-mountain skiing throughout the day.

On snow, you can expect:

• balanced performance-oriented stiffness
• good support when flexing forward
• precise ski control
• efficient transfer of movements
• stable foot positioning
• good control during dynamic skiing
• versatile all-mountain performance
• a more comfortable character than significantly stiffer models
• the possibility of more precise shell customization
• suitability for all-day performance skiing

How to read the parameters

Flex index 100

The exact flex index of the SALOMON S/PRO 100 is 100.

Flex index provides an approximate indication of the resistance a ski boot offers when the skier presses the shin forward against the cuff. A higher value generally means firmer support and more direct response, but it also requires greater strength and more active input from the skier.

A 100 flex represents a medium-stiff performance character. It is firm enough for active skiers who want support during dynamic ski control, while remaining more forgiving and less physically demanding than stiffer high-performance models.

Flex 100 supports:

• performance-oriented ski control
• stability during active skiing
• controlled forward pressure against the cuff
• efficient energy transfer
• good control over the skis
• dynamic carving
• versatility across different speeds
• a balanced combination of support and comfort

Flex indexes are not completely standardized between manufacturers. When comparing different models, shell construction, size, temperature and the physical characteristics of the individual skier should also be taken into account.

Shell width 100–106 mm

The SALOMON S/PRO 100 are specified with a shell width of 100–106 mm.

The base value of 100 mm represents a versatile performance fit that creates relatively precise contact between the foot and the shell. Custom Shell technology, however, allows the construction to be adapted and, according to the supplied specifications, provides an adjustment range up to 106 mm.

This range should therefore not be interpreted as a conventional fixed shell width. It primarily represents the potential to adapt the construction to the individual needs of the skier's foot.

The 100–106 mm range provides:

• a performance-oriented base fit at 100 mm
• the possibility of creating additional space
• better adaptation to individual foot anatomy
• the potential to address problematic pressure points
• a combination of precise positioning and comfort
• more versatile bootfitting possibilities
• suitability for a broader range of foot shapes

Technologies

Custom Shell

Custom Shell technology allows selected areas of the shell to be heat-customized to the individual shape of the foot. Its primary purpose is to create a more precise fit while providing additional space where the anatomy of a particular skier requires it.

The S/PRO 100 have a base width of 100 mm, while the supplied technical specifications indicate customization up to 106 mm. This makes it possible to combine performance-oriented contact between the foot and shell with individual requirements for space and comfort.

Custom Shell can help:

• adapt the shell more precisely to the foot
• create additional space where required
• reduce unwanted pressure points
• maintain stable foot positioning
• improve comfort during longer days on snow
• better match a performance fit to individual foot anatomy

My Custom Fit 3D Perf

My Custom Fit 3D Perf refers to the liner technology focused on wrapping the foot more precisely and maintaining a stable position inside the shell.

The S/PRO 100 use a My Custom Fit 3D Performance liner. Its shaping complements the customizable shell construction and helps create stable contact between the foot, liner and shell.

For the skier, this primarily means:

• a more precise wrap around the foot
• more stable foot positioning
• closer contact with the shell
• reduced unwanted movement
• support for efficient energy transfer
• greater comfort with the correct fit
• better interaction between the liner and shell

Seamless Liner

Seamless Liner technology focuses on liner construction with reduced seams in areas where they could create unwanted pressure against the foot.

Reducing potentially problematic contact points helps improve comfort and decrease the likelihood of uncomfortable pressure spots during longer periods of skiing. The technology also complements the anatomically focused construction of the My Custom Fit 3D Performance liner.

The result is a cleaner, more comfortable interface between the liner and the foot, which is particularly valuable during all-day use of a performance-oriented ski boot.

Customizable performance construction

One of the main strengths of the SALOMON S/PRO 100 is the combination of performance-oriented characteristics with the possibility of individual shell customization.

The base 100 mm width provides precise contact suitable for athletic skiing, while Custom Shell technology allows the construction to be adapted up to the specified 106 mm range. This gives greater scope for adjusting the boots to the individual anatomy of the skier's foot.

The result is not simply greater comfort. A properly customized ski boot can hold the foot more securely, reduce unwanted movement and maintain efficient energy transfer. The purpose of customization is therefore not to create as much internal space as possible, but to achieve a balanced combination of precision, secure positioning and comfort.

The exact flex index is 100, the specified shell width is 100–106 mm, and the construction uses four buckles. The SALOMON S/PRO 100 are from the 2019/2020 season and carry product code N19003940.

My Custom Fit 3D Performance liner

The SALOMON S/PRO 100 are equipped with a My Custom Fit 3D Performance liner, complementing the performance-oriented and customizable shell.

Its purpose is to wrap the foot securely and create an effective connection between the foot and the shell. The liner is important not only for comfort but also for ski control – excessive movement of the foot inside the boot can reduce precision and slow the transfer of movements.

Together with Seamless Liner technology, the construction also focuses on reducing problematic pressure points. The result is a solution designed to combine performance-oriented foot retention with the comfort required for longer days on the mountain.

Four-buckle closure

The SALOMON S/PRO 100 use four buckles, allowing the closure of different areas of the shell to be adjusted and the foot to be securely positioned inside the boot.

Correct buckle adjustment is important for both comfort and precise ski control. The goal is not to tighten the boot as much as possible, but to create even and stable contact between the foot, liner and shell.

The material and exact construction of the buckles are not specified in the supplied information, so no additional technical properties should be attributed to them.

Custom Shell and the 100–106 mm range

One of the most interesting specifications of this model is the 100–106 mm width range. This should not be understood in the same way as a conventional fixed width on a ski boot without substantial customization potential.

The base 100 mm width provides a performance-oriented starting fit. Custom Shell technology then allows the shell to be heat-customized and, according to the supplied specifications, provides additional space up to the stated 106 mm range.

This is particularly useful for skiers who need performance-oriented support but have a specific foot shape or problematic areas where a standard shell creates excessive pressure. Proper customization can help preserve the precision of the boot while significantly improving its usability throughout the day.

Comfort and reduced pressure points

Although the S/PRO 100 are classified as performance all-mountain ski boots, their construction also places considerable emphasis on comfort.

The combination of Custom Shell, My Custom Fit 3D Performance liner and Seamless Liner allows both the shell shape and the contact between the liner and foot to be addressed. Correct pressure distribution is particularly important for reducing uncomfortable areas that can develop into painful pressure points after several hours of skiing.

The model is therefore not focused exclusively on performance. One of its important qualities is the ability to combine solid support and precise ski control with a construction that can be better adapted to the individual foot.

Comparison with narrower performance ski boots

Compared with narrow performance models around 97–98 mm, the SALOMON S/PRO 100 provide more room for the foot with their 100 mm base width, while also offering additional customization potential through Custom Shell technology.

A narrower ski boot can provide very close contact for skiers with narrow feet or those who deliberately want a low-volume fit. For skiers with average-width or more individually shaped feet, however, the 100 mm starting point of the S/PRO 100 may offer greater versatility.

The advantage of this model is the possibility of finding a balance between precise performance-oriented positioning and sufficient space exactly where the foot needs it.

Comparison with stiffer performance ski boots

Compared with models featuring a higher flex, the SALOMON S/PRO 100 offer a less demanding and more versatile 100 flex.

Stiffer ski boots can provide experienced and physically stronger skiers with greater support under very high loads, but they also require more strength and more active technique. A 100 flex offers a more balanced solution for performance-oriented skiers who want good control and support without requiring an extremely stiff shell.

It is precisely the combination of 100 flex, a 100 mm base width and customization potential up to the specified 106 mm range that gives the S/PRO 100 their versatile character for a broad range of performance all-mountain skiing.

Why choose the SALOMON S/PRO 100?

The SALOMON S/PRO 100 are an excellent choice for performance-oriented skiers looking for balanced all-mountain ski boots with a 100 flex, a precise starting fit and the possibility of individual customization. They are not focused solely on maximum stiffness – their strength lies in combining support, control and comfort for all-day use.

Custom Shell technology allows the shell shape to be adapted to the individual foot, while My Custom Fit 3D Perf with the My Custom Fit 3D Performance liner supports stable foot positioning. Seamless Liner focuses on creating a more comfortable interface with the foot and reducing problematic pressure points.

For a performance-oriented skier looking for a 100 flex, customizable 100–106 mm width, four-buckle construction and versatile all-mountain character, the SALOMON S/PRO 100 offer a well-balanced combination of precision, comfort and individual fit customization.