The sneaker that makes your feet stronger, without the painful transition.
The Kjavik One is the only barefoot shoe with the Kjavik 3-step insole system. You set the pace of your transition, from cushioned to true zero drop. Modern sneaker design for the gym, the office and everything in between.
Which size do I need?
Half a size down from your usual sneaker. The wide toe box gives your toes room, so the shoe sits closer to your real foot length.
What if they do not fit?
14 days to try them at home. Size exchange is free, including the return label. A full return costs €4.90 for shipping and processing.
New to barefoot shoes?
The insole system is included free. Start on the 6 mm Comfort insole and take it out after two to four weeks. No extra purchase, nothing to decide at checkout.
build your kjavik one.
Which size do I need?
The Kjavik One runs large and is cut wide. Because of its anatomical shape it sits closer to your real foot length than a conventional sneaker.
Take a size down
Most of our customers wear one size smaller than in conventional shoes. That alone is a good starting point.Measure your foot
Heel to longest toe, standing, in millimetres. Then use the chart below. Leave 5 to 10 mm of room.Still unsure?
Order the size you think fits. Exchanges are free within 14 days, return label included.| EU | Your foot length | Inner length | Inner width | UK |
|---|---|---|---|---|
| 36 | 220–225 mm | 230 mm | 84 mm | 3.5 |
| 37 | 227–232 mm | 237 mm | 86 mm | 4 |
| 38 | 233–238 mm | 243 mm | 87 mm | 5 |
| 39 | 240–245 mm | 250 mm | 89 mm | 5.5 |
| 40 | 247–252 mm | 257 mm | 90 mm | 6.5 |
| 41 | 253–258 mm | 263 mm | 92 mm | 7 |
| 42 | 260–265 mm | 270 mm | 93 mm | 8 |
| 43 | 267–272 mm | 277 mm | 95 mm | 9 |
| 44 | 273–278 mm | 283 mm | 96 mm | 9.5 |
| 45 | 280–285 mm | 290 mm | 98 mm | 10.5 |
| 46 | 287–292 mm | 297 mm | 99 mm | 11 |
| 47 | 293–298 mm | 303 mm | 101 mm | 12 |
Inner length and inner width are the measurements of the shoe itself. “Your foot length” is the inner length minus 5 to 10 mm of room, which is what most people find comfortable. EU 48 is available in the selector as well. Same rule: half a size down from your usual sneaker.
Other brands sell insoles as an accessory. With Kjavik all three ship in every box, so you decide how fast you go barefoot. That is what makes the switch safe instead of forced, and it is why you do not have to choose anything here.
five reasons for stronger feet.
The short version first. Tap “Read more” for the full explanation including the studies.
+57% foot strength
Zero drop and a wide toe box put the muscles in your feet back to work.
The thin, flexible sole of the Kjavik One activates your foot muscles with every step. Zero drop and a wide toe box wake up muscles that go quiet inside cushioned shoes.
More foot strength means more stability, more drive and a base that holds up under every lift, without a single extra exercise.
What the research says: people who wear minimal footwear regularly can increase foot muscle strength by up to 57%.
Holowka et al., “Foot strength and stiffness are related to footwear use in a comparison of minimally- vs. conventionally-shod populations”, Scientific Reports 11, 18351 (2021).
Natural posture
0 mm drop instead of a hidden heel. Your knees, hips and back will notice.
Almost every shoe has a heel, including the ones you would not expect: sneakers, trainers, everyday shoes. That heel tips your body forward. To stay upright, your spine pushes your upper body back all day long. Hips, lower back and neck work against gravity without you noticing.
The Kjavik One has 0 mm drop. You stand square on the ground, the way you would without shoes. Knees, hips and back line up naturally and the load goes where your body wants to carry it.
You feel it at the end of a long day.
A base that does not move
A wide toe box means real force transfer on squats and deadlifts.
The wide, anatomical toe box lets your toes splay and grip, the way feet have worked for millions of years. You stand steadier, push harder and feel every kilo, and every bit of the floor underneath you.
However heavy the set gets, you slip and wobble less. You can finally put your attention on the rep instead of on your feet.
A transition you control
Three levels, from a 6 mm cushion to no insole at all. You set the pace.
Every Kjavik One comes with two insoles free of charge: Comfort (6 mm) and Performance (3 mm). Wear it with neither and you get the third level: three ways to wear the same shoe, from cushioned to fully barefoot.
Start on Comfort. Move to Performance when you want more ground feel. Take both out when you are ready for the real thing. Your muscles build up step by step instead of being overloaded in week one.
You set the pace. Your feet get stronger, not sore.
One shoe, all day
Gym, street, office. It replaces most of the rack.
Lifting shoes for heavy squats. Trainers for the workout. Sneakers for afterwards. And a couple more besides. Enough of that.
The Kjavik One works for squats, deadlifts, sled pushes and box jumps, and on the way home. No changing shoes mid-session, no thinking about which pair suits which exercise.
You put them on in the morning and keep them on. Sneaker design you can wear anywhere: office, dinner, gym.
peer-reviewed. not claimed.
No wellness slogans, only published research on barefoot movement.
More foot strength
People who wear minimal footwear regularly can strengthen their foot muscles significantly, measured against people who have spent their lives in minimal shoes.
Holowka et al., “Foot strength and stiffness are related to footwear use in a comparison of minimally- vs. conventionally-shod populations”, Scientific Reports 11, 18351 (2021).
Drop means natural posture
Zero-drop shoes keep your body square to the ground. Your spine stops compensating backwards, and the constant load on hips and lower back drops with it.
Sinclair, “Effects of barefoot and barefoot inspired footwear on knee and ankle loading during running”, Clinical Biomechanics 29(4), 395–399 (2014).
Knee load when running
Minimal shoes reduce peak loading at the knee compared with traditional running shoes with thick cushioning, at the same speed over the same distance.
Bonacci et al., “Running in a minimalist and lightweight shoe is not the same as running barefoot: a biomechanical study”, British Journal of Sports Medicine 47(6), 387–392 (2013).
why athletes wear kjavik.
Fighters, doctors, calisthenics athletes. Not because it is trending, but because it works.
Stephan Pütz
“In training the Kjavik gives me more power, and in everyday life I just love the natural comfort. Brilliant shoe, the best barefoot shoe out there for me. My pick: the ONE in Glacier White.”
Dr Simone Mortier
“In daily life we should walk barefoot or in barefoot shoes as much as possible. The Kjavik One is comfortable and it looks good. The insole system that comes with it is excellent for a slow transition and can prevent overuse injuries.”
Youssef Kilani
“My current favourite training and competition shoes. Super comfortable and extremely light, which matters enormously in freestyle calisthenics. And they look really good on top of that.”
what kjavik wearers say.
“I did not think a barefoot shoe could look this good. I wear the One every day now: calisthenics, work, everywhere.”
“The Comfort insole was perfect for the transition. After three weeks I took it out. My knee problems are noticeably better.”
“Finally a barefoot shoe I do not have to explain to anyone. Great quality, sustainable, second pair already ordered.”
#kjavikone
still unsure?
Most customers order half a size to a full size down from their usual sneaker. The wide toe box gives your toes natural room, which is intentional. If in doubt, measure your foot length and use the size chart in the configurator above. If you get it wrong, the exchange is free.
We ship from Germany to every country in the European Union, and shipping is free across the EU. The only exception is Malta, where it costs €6.99. Because we ship from inside the EU there are no customs charges and no import fees, whatever country you order from.
We dispatch within 24 hours on business days. Delivery then takes 3 to 7 business days anywhere in the EU. You get a tracking link by email as soon as your parcel leaves our warehouse.
Yes. It is built for the gym, strength training and light running. The wide toe box and 0 mm drop give you maximum contact with the floor on deadlifts and squats.
Quite the opposite. Your feet may feel sore for the first few days, which simply means they are working again. That is exactly what the insole system is for: start on the 6 mm Comfort insole and work your way down. Most customers adapt within two to four weeks.
SUMMER26 brings the Kjavik One down to €109 instead of €148. The code is applied automatically when you check out from this page, so there is nothing to type in.
Modern sneaker design instead of the orthopaedic look, the Kjavik 3-step insole system (two free insoles plus the option to wear the shoe with none) for a gentle transition, more than 70% recycled and vegan materials, and a fair price that already includes the insole system.
You have 14 days from delivery to try them at home. A size exchange is free, including the return label, which you can print or have printed from a QR code at a parcel shop. A full return costs €4.90 for shipping, handling and reprocessing. Shoes need to look unworn.
take the step.
Insole system included · free EU shipping · modern sneaker design.
