- Home
- Technical
Technical
Technical
The manufacture of a modern hill or mountain boot represents a unique blend of traditional boot making skills and modern technology.
Sole
A whole variety of different underfoot situations have to be considered when designing a sole unit. SCARPA® has worked exclusively with the world's leading sole manufacturers (Vibram® and Skywalk®) to develop soles that will meet these different requirements and performance characteristics.




Our Soles
A whole variety of different underfoot situations have to be considered when designing a sole unit. SCARPA® has worked exclusively with the world's leading sole manufacturers (Vibram® and Skywalk®) to develop soles that will meet these different requirements and performance characteristics.

SCARPA® Pro Pulse
PRO-PULSE SCARPA® + Vibram® sole, developed to achieve outstanding performance. The distinctive WAVE design and the characteristics of the latest generation double density polyurethane facilitate the swing and shock-absorbing phases while walking.

Vibram® XS Grip2
Vibram XS GRIP2 represents the natural evolution of Vibram XS GRIP. Used by many bouldering world championship winners...

Vibram® XS Edge
Developed to provide maximum edging support, the VIBRAM® XS Edge compound delivers excellent pure grip while adding improved firmness for the most challenging edging moves.

Vibram® Spyder
Designed by Scarpa® and developed by Vibram®, this new-concept sole has a rubber outsole with a differential design.

Vibram® Vertical
The Vibram Vertical approach sole that simultaneously climbs more effectively and also provides better traction for descending loose terrain

Vibram Total Traction WMN
The new Total Traction Vibram sole unit maximizes grip performance and increases cushioning and at the heart of our mountaineering range. Used on boots like the Mont Blanc GTX &Phantom Guide, the Total Traction signifies a new level of approach comfort light weight and climbing sensitivity.

Vibram® Total Traction
The new Total Traction Vibram sole unit maximizes grip performance and increases cushioning and at the heart of our mountaineering range.

Vibram® Re-Active
The new lightweight midsole incorporates a new, lighter TPU insert in the heel area which allows perfect compatibility with semi automatic crampons. The heel of the midsole has been developed using special high-density Polyurethane, to provide

Vibram® Pentax Speed
The new Pentax Speed sole unit is also another innovation of combining specialist materials with the proven Vibram Mulaz outsole to create an ultra light weight and comfortable yet tough and functional sole.

Vibram® Biometric
The new Vibram Biometric sole unit is anatomically designed for increased comfort ... Lightweight yet extremely sturdy

Vibram® Biometric Lite
The new Vibram® Biometric sole unit is anatomically designed for increased comfort ... Lightweight yet extremely sturdy

Vibram® Mulaz
Outsole Mulaz/Vibram® seamlessly integrated with the mid-sole. The correct balance between height and interspaces of the lugs allow optimum grip and self-cleaning and lightness...

Vibram® Re-Active AC XT
Functional and essential design, a PU combination with differentiated density,
Fit & Sizing
To get the most out of your Scarpa® boots it is important that they should fit you as well as possible...
Boot Lasting and Sizing
All quality boots are built around a carefully crafted foot shaped model - known as a "last". It is the last which gives a boot its fit characteristics. The quality of the lasting, and the time that each upper spends on the last, is crucial in giving Scarpa boots their renowned shape and fit. Scarpa develop a last to specifically suit the end use of each boot. As a result, when you step into a SCARPA boot, you can be sure it has been carefully designed to suit you and your activity. Additionally, SCARPA were the first company to develop a purpose made last for women's boots. Today every ladies specific model has a dedicated female last. These lasts are slimmer in the mid foot and heel areas (Note: This female last may also be appropriate for a slim, low volume male foot and conversely a high volume, broad female foot may be better suited to the standard last).
Foot Preparation
Correct foot preparation is a key component in getting comfortable performance from your boots. Try to buy good performance socks. A few guidelines to look for in a good sock are:
- The tightness of the knit - a good sock will normally be a tight and smooth knit.
- Make sure there is good shaping to the sock - tube socks should be avoided.
- Check that the sock has good stretch and elasticity.
- If possible try to use socks that wick moisture away (the foot puts out around 50ml of sweat per day)
Socks are an ideal way of making small adjustments to the volume and fit of the boot so be prepared to experiment with combination and density of socks you use to get the best fit - but we believe that you should never wear more than two pairs (A liner and an outer sock). If you need more than two socks it is likely that you need to take the next boot size down.
Initial Fitting of the Boot
The start point in fitting the boot is to ensure that you have the right size and remember that it is possible to customise the fit of a boot that is slightly too large but it is virtually impossible to do anything about a boot that is too small. If in doubt go for a size that is slightly large rather than one that is too small. Bear in mind that the critical size element is the length. Boots will often give or can be modified in width terms but it is virtually impossible to modify the length of a boot.
When trying the boot on make sure you do so with your usual sock combination. You should also bear in mind the end use of the boot. For example if you are going to use your boots when you are likely to be carrying a heavy rucksack then this will alter the loading and shape of your foot. You should therefore try wearing the boots with a loaded sac on. Also boots used for the mountains will be used in an uphill and downhill mode. You should therefore simulate this when trying the boots on.
An increasing number of specialist shops are now providing 'incline boards' for you to test boots on. The key points to bear in mind are that when testing the boots in a down hill mode, properly laced up, your toes should not be pushing against the front of the boots. Equally, there should not be as much of a finger width at the heel otherwise your boot volume is too large for you.
Lacing up the boot
Even the best fitting boot will not give maximum performance unless it is correctly laced up. Correct lacing ensures that boot fits snugly and will prevent 'forward slip' of the foot in the boot and will reduce friction that could otherwise lead to blisters. When lacing the boot ensure that you start from the toe and gradually tension the lace between each set of hooks. Lace locks allow for the tension to be held over the fore foot whist giving a separate level of adjustment and tension around the ankle of the boot.
Be prepared to adjust your lacing as you go. It is common to find that as you need to re-tension the lacing after a short distance even in boots that have been well broken-in. Also the foot shape will adjust during the day with temperature, terrain and load carried.
Boot modifications
It is not uncommon to find that some modification to the boot is required to get an optimal fit. There are several ways to achieve this:
- Footbeds - There are a variety of high performance footbeds available to suit differing needs.
- Volume Adjusters - A thin insert which can be added under the footbed to reduce the overall volume of the boot. This can make up to a half size difference in fit.
- Rubbing Bars - Some people have specific foot problems (e.g. swollen toe joints) which can cause problems when fitting new boots. It is worth knowing that boots can often be 'stretched' in specific areas to ease any painful rub points. Some specialist shops have rubbing bars specifically designed for this purpose. It is also possible to modify slightly heel and toe shapes to improve the fit of a boot. However this is a job best done by a trained boot fitter and we would recommend that it is done as a 'retro fit' adjustment.
Breaking Boots-In
As a general rule high performance hill and mountaineering boots are made from thicker leathers and have stiffer midsoles than do lower level walking boots. It is therefore essential to break in higher performance boots. To do this you should start by wearing them for a short distance and progressively lengthen the walks that you do. Never be tempted to take new boots and go out for a long trip in them. Always break them in over time.
It is often easier to prevent rubbing or blister problems. A piece of elastoplast or Second Skin put on early will often prevent a blister forming. If a blister does occur in the breaking in process then there are now excellent treatments available of which Compeed is probably the best known. A good pair of boots correctly fitted will give you many miles of comfortable use but it is worth remembering that almost as much of the comfort lies in the fitting and adjustment of the boot as in the boots themselves. We hope this information is helpful to you and wish you years of comfortable use from your Scarpa Boots.
Bootcare
Your SCARPA boots are good to go straight from the box however, despite developments in technology, all of the footwear in our range requires regular aftercare to maintain the highest level of performance and durability..
We recommend that you follow these guidelines to get the most out of your boots.
- After each use rinse off mud and dirt with clean water. Remove any stubborn dirt with a sponge, damp cloth or brush. If your boots are particularly dirty you can use a cleaning product such as Nikwax Footwear Cleaning Gel.
- Dry your boots naturally over time in a cool, dry place with good air circulation (Never force dry your boots using heat, as this will damage the leather uppers)
- Regularly treat them with a suitable waterproofing treatment applicable to the type of boots you have (See below). We would recommend re-proofing the boots whenever they get particularly dirty or when water stops beading (turning to droplets) on the surface of the boots.
- Take care to apply treatments to tongues, D. rings and hooks. Do not over treat them as this can soften the leather and damage stitching.
MONTANA CALF LEATHERS
- Terra
A high quality 2mm leather ideal for the entry level boots in our range. Montana leather is very supple and very lightweight which gives a soft, comfortable fit ideal for entry level boots. The leather is oiled to boost natural water resistance and to improve the cosmetic finish. Use a proofing agent from new, for best results we recommend SCARPA HS12 cream or a water based wax treatment such as Aqueous Nikwax.
GORE-TEX
It is a common misconception that boots with a Gore-Tex membrane require less care, this is not the case. Leaving a Gore-Tex boot untreated will likely damage the boot. Gore-Tex boots should be cleaned and re-proofed regularly in accordance with the care instructions for the specific materials below.
Over time particles of dirt and debris will build up on the inside of your boots, this can cause abrasion which can damage the Gore-Tex lining of your boots which can cause the boots to leak. In order to extend the life of your footwear it is best to periodically remove the insole and rinse the inside of the boot with clean warm water. Always leave your boots to dry naturally following this process.
CALF LEATHERS
- Ranger 2 Activ
- Delta Activ
High quality leather of 2.4 or 2.6mm in thickness, they are ideal for fell or lightweight hillwalking boots. Calf leather undergoes a traditional tanning process which helps to make it durable and highly water resistant. Use a proofing agent from new, for best results we recommend SCARPA HS12 cream or a water based wax treatment such as Aqueous Nikwax.
SHERPA LEATHERS
- SL Activ
A 2.7-2.9 mm leather. The extra thickness and durability of this leather is perfectly suited to stronger hill and mountain walking boots, where extra support and resistance to scuffing is required. Sherpa leather undergoes a full HS12 silicone tanning treatment which, coupled with the extra thickness of the leather, boosts water resistance and stops the leather from wetting out too easily. We recommend the use of SCARPA HS12 cream or Aqueous Nikwax from new.
NUBUCK LEATHER
- Kinesis Tech
- Mythos Tech
Nubuck is a full grain leather where the outer surface of the leather has a finely sanded, texturised finish, which gives the boot an added appeal. All Scarpa Nubuck leathers are HS12 treated and will give the same performance as Sherpa leather, although the surface finish will change over time. Use specialist Nubuck treatments such as Nikwax Nubuck and Suede from new to keep the uppers in the best condition. SCARPA HS12 can be applied however this will flatten the texturised finish of Nubuck leather and darken the colour. The original finish can be restored using a suede brush.
CROSTA (Reversed Leather)
- Manta
- Mont Blanc
These are premier leathers used on full mountain boots where maximum strength, support and abrasion resistance is required. These leathers are used with the tanned finish reversed with the textured side out and the tanned surface inside. This helps to protect the tanned surface of the leather and the extra surface area of the brushed finish helps to boost water resistance. All Scarpa reversed leathers are HS12 treated. For reversed leather we recommend Nikwax Nubuck and Suede treatment, followed by a light brushing with a suede brush, this will retain the appearance of the reversed leather.
FABRIC/SUEDE
- Cyclone
- Mustang
- Baltoro
- Kinesis
Suede does not offer the same level of water resistance as smooth leather however suede is both lightweight and relatively durable which makes it the ideal choice for lightweight trekking models. Suede is thinner and more supple than full grain smooth leather but still requires regular care. Take care to re-proof areas where suede joins other materials to ensure that the suede retains maximum flexibility. We recommend use of Nikwax Nubuck and Suede or Graingers G-Max from new.
KCN-TECH/S-TECH/MICROTECH
- Rebel
- Rebel Ultra
- Rebel Carbon
A fabric studied especially for Scarpa. KCN-TECH is derived from three high-tenacity textile fibres woven together, by Schoeller, to form an incredibly lightweight, durable waterproof breathable fabric. Ideal for use on our Mountain Elite line KCN-Tech ensures the perfect balance between performance and weight. S-Tech is a completely synthetic alternative to leather which provides durability and water resistance with a radical weight saving in comparison to leather. Another benefit of S-Tech is that it has a great memory which means that once is it ‘lasted’ into a shape it will hold that shape as the boot ages despite abrasion etc. This makes it perfect for use on our Mountain Elite line. We recommend using Nikwax Fabric and Leather proof or Grangers G-Max periodically to ensure the highest level of water resistance is maintained.
K-TECH/L-TECH/S-TECH
- Phantom Series
- Charmoz Pro
- Rebel Lite
A synthetic material, made by Schoeller, which ensures maximum durability with minimum weight. Combined with S-Tech this allows us to achieve a lightweight boot which is strong enough for summer and winter mountaineering, scrambling and Via Ferrata. We recommend using Nikwax Fabric and Leather or Grangers G-Max periodically to ensure that the highest level of water resistance is maintained
Leather
Leather is a natural material and selection of the right grade of leather to meet the end use of the boot is an essential and a high specialist skill...
Tanning Process
The origin of the hide, the age, rearing and care of the beast and the tanning process are all critical elements which effect the finished performance and look of the boot. SCARPA have over 50 years experience of dealing and negotiating with tanneries to secure the finest leathers and meticulously select the hides they use in their leather walking and mountain boots. The tanning process is a critical factor in the production of quality leathers and is what makes the leather water resistant. Some leathers use traditional tanning processes and ingredients. More expensive leathers like Scarpa's HS12 use a tanning treatment which forces a silicone based ingredient deep into the leather. This gives improved and more durable water resistance to the leather and also allows the leather to dry out faster, even when it does become wet. Leather is still regarded as the finest material for quality walking boots. It does however require care and protection to maintain its performance.
Full grain calf leather
A high quality leather of 2.4mm to 2.6mm in thickness, ideal for fell or lighter weight hillwalking boots, which require less bedding in.
HS12 Sherpa Leather
A 2.7 mm to 2.9 mm tanned leather. The extra thickness and durability of this leather is perfectly suited to stronger hill and mountain walking boots, where extra support and resistance to scuffing is important. Sherpa leather is treated with the HS12 tanning process which is durable and resistant to scuffing and stops the leather from wetting out so easily.We recommend the use from new of Scarpa's HS12 cream.
Nubuck Leather
A full grain leather where the outer surface has a finely sanded, texturised finish, which gives the boot an added appeal. Scarpa Nubuck leathers are treated with HS12 to ensure best performance. This leather should not be confused with suede or reversed leathers.
Crosta
This is the standard grade of leather used by most leading mountaineering boot manufacturers. It is a premier leather for mountain footwear and gives excellent comfort and general performance. However, without the HS12 treatment, its water repellancy is not as efficient as Reversed Anfibio leather.
HS 12 Reversed Anfibio Leather
The finest, premier leather at 3.0mm + thickness. Reversed Anfibio offers maximum strength, support and abrasion resistance. There leathers are"reversed" (i.e. with the textured side out and the tanned surface inside). This protects the hides best surface from scuffing and abrasion, which improves durability and water resistance. Reversed Anfibio is a prime quality leather and should not be confused with ordinary leathers or suede. All Scarpa Reversed Anfibio leather has the specilised HS12 tanning treatment which impregnates silicone into the leather, making the leather more water resistant. This treatment is durable and resistant to scuffing, stops the leather from wetting out so easily and dries out faster than traditionally tanned leathers.
HS12
A special tanning treatment making the leather more water resistant, breathable and quicker drying than normal untreated leather. This treatment is durable and resistant to scuffing. All Sherpa, Nubuck and Reversed Anfibio leathers in the Scarpa range are given this additional treatment.
Last
Scarpa develop a last to specifically suit the end use of each boot. As a result, when you step into a SCARPA boot, you can be sure it has been carefully designed to suit you and your activity. Additionally, SCARPA were the first company to develop a purpose made last for women's boots. Today every ladies specific model has a dedicated female last. These lasts are slimmer in the mid foot and heel areas (Note: This female last may also be appropriate for a slim, low volume male foot and conversely a high volume, broad female foot may be better suited to the standard last).
Explode the myths!!

Our Lasts
Scarpa develop a last to specifically suit the end use of each boot. As a result, when you step into a SCARPA boot, you can be sure it has been carefully designed to suit you and your activity. Additionally, SCARPA were the first company to develop a purpose made last for women's boots. Today every ladies specific model has a dedicated female last. These lasts are slimmer in the mid foot and heel areas (Note: This female last may also be appropriate for a slim, low volume male foot and conversely a high volume, broad female foot may be better suited to the standard last).

FT Last
Used in Manta Tech. A proven mountaineering last over many years, that has a strong asymmetric shape focusing the forefoot in the "climbing zone" for optimal sensitivity and precision, yet maintains a all round comfortable fit for extended walk ins.

LFT
A proven last that has a strong asymmetric shape, focusing the forefoot in the "climbing zone" for optimal sensitivity and precision. LFT is a slightly lower volume and neater variant of FT. Used in the Manta Tech Women.

ARG
Hugely successful last that provides a great balance between climbing precision and all day mountain comfort. Distinct underfoot rocker, aids walking comfort. Sculpted and low volume heel zone offers great heel retention. Used in Ribelle Lite.

TM

BAG

WBAG
Woman's specific variant of the BAG. A boot fitters favourite, this shape when in combination with sock fit tongue constructions has a habit of fitting all manner of foot shapes. Medium volume with super feel retention. . Used in R-Evo GTX WMN.

BD Last
Broad and high volume last offers excellent comfort, with a pronounced underfoot rocker for walking comfort on paths and trails. |

LBE Last
Woman's specific variation of the BD last. Broad and high volume it offers excellent comfort, with a pronounced underfoot rocker for walking comfort on paths and trails. Used in women's Ranger 2 Activ.

TN
A both narrow and low overall volume last, specifically sculpted to offer a unique fit for the slimmer foot. Natural rocker suited to hiking and walking models. Used in Trek GTX.

TX
Broad and very high volume, with a deep toe box this last offers excellent comfort for those with very wide feet and bunions, with a natural underfoot roll for walking and hiking comfort. Used in Trek HV GTX.

TNL
A woman's specific version of TN last - both narrow and low overall volume last, specifically sculpted to offer a unique fit for the slimmer foot. Natural rocker suited to hiking and walking models. Used in Trek GTX WMN.

TML
A women's version of TM with medium volume, medium width, but a closer heel fit and slightly lower volume across the mid-foot. Used in Peak GTX WMN , Kailash Plus WMN and Khumbu WMN

BB Last
Used in Vortex. This medium to high volume dedicated shoe last offers the instant comfort proven in our ZG trekking line, but affords "real" foot support and hold making these shoes perfect for more technical walking.

BBL Last
A dedicated low cut shoe last and woman's variant of the BB last. Medium volume and forefoot width, central toe shape. Used in Vortex WMN.
Midsole
The midsole, sandwiched between the sole and the upper, is the hidden component in boot manufacture. In many ways it is the “engine room” of a boot and one of the most important components.

Hi-Flex
A midsole with generous flex down its length but offering good lateral support. Featured in the walking boot range it not only provides good support for walking, but is also instantly comfortable and requires virtually no breaking in. Can be Poly propelene, Nylon or Texon material dependant on model.

Comfort Flex
Using nylon for its permanent performance qualities, the comfort flex midsole is moulded so it has minimum flex in the heel section but gives comfortable flex in the forefoot area. It is used for walking and hillwalking footwear.

Performance Flex
This is a more robust, nylon midsole giving superb support to the whole foot. Its graded design provides a perfect balance between longitudinal flex and total lateral support for walking on rough ground or steep hillsides. Performance flex is used in the top performance hill and mountain walking boots. It requires a short amount of breaking-in but supports and protects the sole from the tiring effect of walking on hard or rocky surfaces. Boots with this midsole can be used with flexible walking crampons.

Proflex
Used in serious mountain walking and scrambling boots, this unit is stiffer than Performance flex. Whilst it retains some longitudinal flex for walking comfort, its extra stiffness is designed to give total underfoot support. Pro-flex is used in serious mountain boots where crampons may be used.

Pro-Fibre
Used for serious mountaineering, scrambling and climbing. This midsole retains a small degree of longitudinal flex for comfort during walk-in's and serious mountain walks.

Pro-Flex XT
Used in fully stiffened boots, with sustained front pointing in mind, this heavy duty nylon midsole is further supported with an integral shank for maximum underfoot support.

Carbon Fibre
Used in the Rebel Ultra GTX and the Rebel Carbon GTX, provides a fully rigid, torsionally stiff, lightweight yet immensely strong mid sole.
Technologies
The manufacture of a modern hill or mountain boot represents a unique blend of traditional boot making skills and modern technology.
Whilst technology continues to provide a variety of new materials which aid the development of modern footwear, it is the boot maker's skills that differentiate quality boots from cheaper boots.
It is these skills, in the selection of leathers, the lasting and make up of the boot and the harnessing of the most appropriate technology, which provide the magic ingredients in good footwear.
SCARPA® has had over 50 years experience of making the worlds finest mountain boots. Todays SCARPA® footwear represents the ideal marriage of craftsmanship and technology. Below are some of the critical components in the construction of this footwear.
To find out more, read the technical feature pages below:
Revolutionize the performance and comfort of waterproof / breathable...
PrimaLoft® insulation products offer superior performance for high quality...
The design of the upper ensures that the ankle moves correctly and freely...
The Flex Point System allows your ankles complete freedom of movement,...
Vibram® concentrates its industrial design activities, managerial and...
The TPS (Toe Power Support) is a thermoshapable insert positioned under the...
This active midsole concept adapts to the changing footshape while loading...
It follows the same concept as X-TENSION™, but it works in connection with...
Basically, a reverse slingshot rand that's anchored under the critical toe...
SCARPA's® experience and research guarantee absolute comfort in the new...
SCARPA's® experience and research guarantee absolute comfort in the new...
The "HEEL TENSION SYSTEM" is an innovative system applied to the heel area...
The "ANKLE PADDING SYSTEM" is made of a special "MEMORY FOAM" which allows...
The AUTOFIT COLLAR, thanks to the ergonomic design of the collar and to the...
The "V-FLEX SYSTEM" is the ergonomic design of the upper on the ankle flex...
The "SEED LACING SYSTEM", integrated with the ergonomic design of the upper,...
The ZERO GRAVITY products are desinged to to be as functional as possible...
Cocona, Inc. is a privately-held company based in Boulder, Colorado. Our...
Undoubtedly the evolution performance and agility concept. A construction...
Simply, it holds the foot from below like a big hand and acts like a power...
Four seasons in a day gore-tex® performance comfort footwear will always...
Reinforced Elastic Band
The first all-round breathable and waterproof hiking shoe/boot. Hiking...
Thanks to the HDry® quality standard, the shoes built with this system...