
Bont Size Chart - Slipstream and Vaypor Boots
How to measure your feet
Skate boots are not like your average shoe. For maximum control, your boots need to fit like a second skin. That is why Bont boot sizing is NOT the same as your US shoe size or other skate brand sizing.
Wear the type of socks you'll wear with your boots. Distribute weight evenly before measuring.
STEP 1
On a hard surface, tape a piece of blank paper to the floor. Stand up straight with your foot on the paper. Your heel should be barely touching the wall or not at all. DO NOT push heel into the wall as it will produce incorrect length measurements.
STEP 2
Mark the longest part of your foot (heel-to-toe length) and widest part of your foot on the paper with a pen or pencil. If your heel is away from the wall trace around your whole foot. Make sure your pen is held vertically, not at an angle. Repeat with the other foot, as the right and left foot may be different sizes.
STEP 3
Use a ruler to measure the heel-to-toe length and width measurement for each foot. Take these measurements and input them into the size calculator or compare them to the size chart below.
Use the calculator and chart below to find your correct Bont size for the Slipstream and Vaypor boots. Input your measurements in millimeters for the most accurate fit.
Looking for a different boot model?
- Eclipse Boot – Size Chart and Calculator (NEW)
- Parkstar, Prostar and Quadstar Boots – Size Chart and Calculator
- Inline and Roller Skate Boots (All Other Models) – Size Chart and Calculator
Size Calculator
Enter your foot length and width in millimetres and press "Enter" to get a recommended Bont size with width classification.
Note: The size calculator is a guide only and may not be suitable for all foot shapes. Width measurement helps determine if you need standard, double-wide oe custom fitting.
Left Foot
-
Heel to longest toe
-
Widest part of foot
- Enter measurements
- Not specified
Right Foot
-
Heel to longest toe
-
Widest part of foot
- Enter measurements
- Not specified
Size Chart
If you have narrow or wide feet, we recommend using the size calculator above for a more tailored suggestion. The calculator will automatically determine your width category and adjust sizing recommendations accordingly.
| FOOT LENGTH (MM) | SIZE | STANDARD WIDTH (MM) | WIDE WIDTH (MM) |
|---|---|---|---|
| 175 - 179 | 180 | 65 - 69 | 69 - 73 |
| 180 - 184 | 185 | 68 - 72 | 72 - 76 |
| 185 - 189 | 190 | 69 - 73 | 73 - 77 |
| 190 - 194 | 195 | 70 - 74 | 74 - 78 |
| 195 - 199 | 200 | 71 - 75 | 75 - 79 |
| 200 - 204 | 205 | 74 - 78 | 78 - 82 |
| 205 - 209 | 210 | 76 - 85 | 80 - 89 |
| 210 - 213 | 215 | 77 - 86 | 81 - 90 |
| 214 - 219 | 220 | 79 - 88 | 83 - 92 |
| 220 - 223 | 225 | 80 - 89 | 84 - 93 |
| 224 - 229 | 230 | 82 - 91 | 86 - 95 |
| 230 - 234 | 235 | 84 - 94 | 88 - 98 |
| 234 - 239 | 240 | 85 - 95 | 89 - 99 |
| 240 - 244 | 245 | 87 - 96 | 91 - 100 |
| 245 - 250 | 250 | 88 - 98 | 92 - 102 |
| 251 - 254 | 255 | 89 - 99 | 93 - 103 |
| 255 - 260 | 260 | 90 - 101 | 94 - 105 |
| 261 - 264 | 265 | 92 - 102 | 96 - 106 |
| 265 - 270 | 270 | 93 - 103 | 97 - 107 |
| 271 - 274 | 275 | 95 - 105 | 99 - 109 |
| 275 - 280 | 280 | 97 - 108 | 101 - 112 |
| 281 - 284 | 285 | 98 - 109 | 102 - 113 |
| 285 - 290 | 290 | 99 - 110 | 103 - 114 |
| 291 - 294 | 295 | 100 - 112 | 104 - 116 |
| 295 - 300 | 300 | 102 - 113 | 106 - 117 |
| 301 - 304 | 305 | 104 - 116 | 108 - 118 |
| 305 - 310 | 310 | 105 - 117 | 109 - 119 |
| 311 - 314 | 315 | 107 - 119 | 111 - 123 |
*This product is made to order and takes approximately 2 weeks to produce.
Slipstream Inline Boot
All the performance you loved in the BNT, now with even greater stiffness, precision, and refinement.
The Slipstream is the latest chapter in a 50-year legacy of innovation that began with the Hustler, evolving through the Psycho, Maxi Lunge, Team Bont, Black Widow, Pyrotechnics, ZX5, Z, and BNT. Every generation has brought improvements, and the Slipstream is the culmination of all that experience. This is not just a boot — it’s half a century of racing evolution.
The Slipstream retains everything that made the BNT a world-class boot: a heat moldable, ultra-lightweight build, and performance fit trusted by the world’s best. Constructed from 100% carbon fiber from Japan, it is stiffer, lighter, and more responsive than ever.
New and Enhanced Features:
-New power ridges along the base and up the sides increase rigidity and carbon stiffness for enhanced power transfer
-Upgraded epoxy resin is 40% stiffer than the BNT’s, delivering sharper responsiveness and longer-lasting performance with less deformation (but slightly less moldable)
-All-new last delivers a fit that feels more like a custom boot than any stock model we've ever produced
-Refined custom sanding process for tighter, more precise fitting, especially in custom orders
-Premium outer skin available only in black or white for an elite finish
-Anti-stretch lace cover with a notch to hold your knot and keep lace tension locked in
-New buckle design for better foot lockdown and security
-Silver-thread carbon weave adds a sleek, high-performance visual edge
-Aluminium mounting blocks with gold-colored anodized holes, a new construction method that keeps weight low without compromising performance
-Ventilated tongue with Velcro to hold it in place, offering cooling airflow and padded comfort to prevent lace bite
-Waxed laces with minimal stretch for better tension retention and foot stability
Every detail has been considered, every component re-engineered — the Slipstream is built for serious competitors who demand the best.
Get ready for the Slipstream. 50 years in the making.
Upgraded epoxy resin is 40% stiffer than the BNT’s, delivering sharper responsiveness and longer-lasting performance with less deformation

Silver-thread carbon weave adds a sleek, high-performance visual edge

Air ventilation throughout the boot.
Aluminium mounting blocks with gold-colored anodized holes, a new construction method that keeps weight low without compromising performance

All-new boot shape delivers a fit that feels more like a custom boot than any stock model we've ever produced

Q&A
Q: What is the difference between the Bont Eclipse and Slipstream?
A: The Eclipse is made on a slightly wider last with slightly softer padding, designed more as an entry-level boot. The Slipstream is intended for professional-level skaters. The Eclipse features a sliding frame mounting system, whereas the Slipstream uses exposed mounting blocks. The Slipstream is less heat moldable than the Eclipse and is a less forgiving boot with harder padding that offers better power transfer. It's built on a narrower last for that tight, custom boot feel. The Slipstream also uses more premium materials throughout.
Q: What is the difference between the Slipstream and Vaypor?
A: The Slipstream is a pro-level boot built to win world titles. But the Vaypor takes everything even further with a no-expense-spared approach, from custom buckles to specially hand-laid carbon fiber and the most premium outer skin available. The Vaypor has no peer. The Slipstream will outperform any boot on the market, except the Vaypor.
In-House Resin Technology
Bont has been developing our own resin systems since 1975. Unlike most manufacturers, we create our resins in-house to meet the specific needs of performance skating boots.
Our resin is extremely stiff for power transfer, yet softens at just 60°C (140°F), the lowest heat-molding temperature in the industry. This allows the boot to be reheated and remolded multiple times for a precise, custom fit.
Epoxy resin is a thermosetting polymer that requires a precise balance of resin and hardener. Temperature and humidity affect how it cures, so we use a computer-controlled mixing system to ensure the perfect ratio every time.
Most brands use pre-preg carbon, where the carbon manufacturer selects the resin and the boot maker cannot modify it. This limits heat moldability and often requires very high temperatures for even minor adjustments.
By developing our own resin, we control stiffness, flexibility, cure speed and heat-molding performance, giving skaters a boot that is strong, responsive and easy to customize.
Lightweight Design
Bont boots are built to be lighter and stronger than traditional skate boots. We achieve this by hand-building each boot from the inside out, laying carbon or fiberglass directly around the last. This method takes significantly more time than conventional construction, but it creates a lighter, more responsive boot without sacrificing strength.
Liner Materials
Bont boots use a range of premium liner materials chosen from hundreds of tested options. All of our liners are lightweight, durable and designed to resist sweat breakdown and odor.
Available Liner Materials
• Microfiber – Light, strong, fights odor and resists sweat damage.
• Suede-L – Soft, durable and vegan friendly, with strong odor and sweat resistance.
• Durolite – Extremely durable and lightweight, able to handle minor crashes without scratching. Vegan friendly.
All liner materials used in Bont boots meet our standards for comfort, longevity and performance.
Boot Last Design
A last is the foot-shaped mold that a boot is built around. The accuracy of the last determines how well a skate fits.
Bont has been refining our lasts since 1975, and we continue to improve them to ensure our boots fit comfortably straight out of the box. Unlike many brands that rely on generic lasts, we develop and update our own designs to achieve a precise, performance-focused fit.

Footbed Design

Foam Padding
Most skate boots use sponge-style open cell foam. It is light and inexpensive, but the porous structure absorbs water from sweat, rain or puddles, which makes the boot heavier over time.
Bont uses high-quality closed cell memory foam instead. This type of foam does not absorb water, so your boots stay light, responsive and consistent no matter the conditions.

Anti-Stretch Reinforcement
Our proprietary Anti-Stretch material has strength characteristics similar to Kevlar. It is placed between the outer layer and the boot’s internal skin to help prevent unwanted stretching.
To keep this layer stable, we stitch it to the outer and bond it to the liner, making it a permanent part of the boot’s structure. This construction helps Bont boots hold their shape and resist stretching far better than many competitor boots.

Carbon Fiber
Carbon fiber (or carbon fibre, depending on US or UK spelling) is an advanced composite material known for its exceptional strength-to-weight ratio. It is as strong as steel while weighing only a fraction as much.
Carbon fiber is made from bonded carbon atoms aligned along the length of each fiber. Thousands of these fibers are twisted into a yarn, which is then woven into fabric. This fabric forms the carbon sheets used in high-performance products.
Bont has been producing carbon-based boots since 1989. We source our carbon exclusively from Toray in Japan, the world leader in carbon fiber manufacturing.

Types of Carbon We Use
3K PLAIN
A tightly woven carbon commonly used in the aircraft industry and throughout Bont boots. Strong, reliable, and ideal for structural applications.

UNIDIRECTIONAL
Extremely stiff, lightweight carbon with fibers running in a single direction. This lets us place the carbon exactly where strength and support are needed. Used in our highest-performance boots, such as the Vaypor.

12K PLAIN
A larger weave that is more economical but not as strong as 3K. It reduces cost while maintaining adequate performance in less demanding applications.
INDUSTRY MISREPRESENTATION
Modern composites can be confusing, and not every product marketed as “carbon” contains true carbon fiber construction. Here are common examples of misleading terminology in the industry:
Single-Layer Carbon
Some boots have a plastic, nylon or fiberglass base covered with only one cosmetic layer of carbon. Although they can legally say “carbon base,” the structure underneath is not full carbon.
Unidirectional Carbon (Misused)
Some brands add carbon particles into plastic and call it “unidirectional carbon.” True UD carbon refers to continuous fibers all running in the same direction, not carbon-filled plastic.
Silver Fiberglass
A plastic base with carbon particles is often wrapped with silver fiberglass, then marketed as “carbon fiber.” Real carbon fiber fabric is always black.
100% Composite
A vague term that can mean almost anything. In most cases, it refers to a nylon–fiberglass composite, not a full carbon construction.
Monocoque (Misused)
A true monocoque boot has carbon laminated directly onto the liner, forming a one-piece shell. Some brands use the term incorrectly for shells with an integrated heel cup.
In Summary
Carbon terminology can be misused, so it helps to understand what you are buying. Bont uses genuine carbon fiber from Toray and builds boots with transparent, proven construction methods. Knowing the differences ensures you get the performance, strength, and value you expect from a true carbon boot.
Upper Construction
The upper is the lightweight outer section of the boot. It is glued and stitched to the base for strength and durability. Ventilation holes are punched by hand through both the upper and the liner, and the buckles and straps are attached to secure your foot firmly in place.
Each boot then goes through sixteen independent quality control checks before it is approved. This process helps us maintain one of the best strength-to-weight ratios on the market.
Heat Moldable Fit
Bont boots are the most heat-moldable boots on the market. Our proprietary resin is extremely stiff for performance, yet becomes pliable at low temperatures, allowing the boot to be shaped safely and easily.
Unlike many skates that can only be molded in small areas, Bont boots are moldable across the entire base. This gives skaters the ability to fine-tune the fit of the whole boot for a truly customized feel and a more anatomically accurate shape.
For instructions on how to heat mold your inline, carbon or fiberglass roller skate boots, visit our Heat Molding page.
Lace Cover
Many Bont boot models include a lace cover, which provides added support and keeps your laces neatly tucked away for a clean, secure fit.

Micro Adjustable Buckle
The micro-adjustable buckle gives you an extra level of precision when tightening your boot. It is easy to use while skating, allowing you to bend down and make quick adjustments for a secure fit, even mid-race if needed.

Lace Eyelets
Bont eyelets use a larger head to spread lace pressure over a wider area, reducing discomfort on the top of the foot. Smaller eyelets concentrate pressure in one spot, which can cause pain during longer skating sessions.