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  • Giro SuperNatural Fit Kit
  • Giro SuperNatural Fit Kit Bottom
  • Giro SuperNatural Fit Kit Top
  • Giro SuperNatural Fit Kit Different Arch Support Sizes
  • Giro SuperNatural Fit Kit Detachable Arch Support
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  • Detail Images - Bottom
  •  - Top
  •  - Different Arch Support Sizes
  •  - Detachable Arch Support
GiroSuperNatural Fit Kit

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Item # GIR0281

Along with shoes, Giro saw the need for better insoles. They so liked the results of their insole design work that they're selling them as an after-market accessory, the SuperNatural Fit Kit. Their goals were to make their insoles more comfortable for a wide range of foot types, and that they'd offer enough adjustability to perhaps negate the need for investing in custom insoles.

One of the few benefits of the wafer-thin insole that many shoe companies supply with shoes is that it is wafer thin. No bulk in what is an extremely close-fitting shoe is most often a good thing. This keeps the ball of the foot very close to the sole and in turn the pedal spindle, minimizing stack height, and it keeps the heel very low in the heel cup, maximizing the cup's ability to hold the heel down. Giro started with these two benefits and added one of the benefits of custom insoles; arch support. Arch support, is critical for cycling comfort. When the leg pushes down on the foot, the arch can flex, which can lead to shoe movement, which can lead to alignment issues, to the foot moving in the shoe, to developing hot spots.

Another benefit of custom and semi-custom insoles is a "metatarsal button" that provides greater mid-foot comfort. Giro has included a subtle button as they've found wide variation in individual rider's ability to find such a feature comfortable.

The base of the insole is a thin layer of EVA foam. It's thick enough that normal use of the insoles will help to customize, or tune, or crush some of the EVA so that you'll see divots in the foam after a few rides. This will increase the surface area of contact points, which should increase comfort, but the EVA is secondary to the three arch supports that come with each insole.

There is a small, medium, and large arch. They can be easily and quickly swapped in and out. The small maintains the contour of the insole itself. The medium adds 3mm to the arch compared to the small. The large adds another 3mm beyond the medium. These are easy to use. First, in either bare or thinly-socked feet, place the support under your foot. Try different sizes until you find one that seems snug against your foot. You want it close because you don't want your arch acting like a leaf-spring each pedal stroke. Figure out the size. Ride. Adjust if necessary.

The insoles are covered with X-Static fabric. The name is familiar because you've already seen Giro and others use it in helmet pads. It's a silver, the mineral, fiber that is bonded to a polyester fabric to make the fabric anti-microbial, anti-stink.

You'll see that each size of the Giro SuperNatural Fit Kit fits a number of size shoes. These are "trim to fit" insoles and there's a cutting guide underneath each insole, but your best bet is to either compare it to your stock insole or shove it inside your shoe before commencing on any alterations.

  • EVA foam
  • Small, medium, and large arch support
  • X-Static antimicrobial fabric
  • Super-thin design
  • Trim-to-fit
Tech SpecsSize
Tech Specs
Recommended Use


Cycling Footwear
36   5 3 23
36.5   5.5 3.5 23
37   6 4 23.5
37.5   6.5 4.5 24
38   6.5 4.5 24
38.5   7 5 24.5
39 6.5 7.5 5.5 25
39.5 7 8 6 25
40 7.5 8.5 6.5 25.5
40.5 7.5 8.5 6.5 26
41 8 9 7 26
41.5 8.5 9.5 7.5 26.5
42 9 10 8 27
42.5 9.5 10.5 8.5 27
43 9.5 10.5 8.5 27.5
43.5 10   9 28
44 10.5   9.5 28
44.5 11   10 28.5
45 11   10 29
45.5 11.5   10.5 29
46 12   11 29.5
46.5 12.5   11.5 30
47 13   12 30
47.5 13   12 30.5
48 13.5   12.5 31

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  • Familiarity: I've used it several times
  • Size Bought: Large

I have Tried different insoles. These are fat the best insoles I have ever tried. Bought my wife a pair now too.

Custom insoles on a budget

  • Familiarity: I've put it through the wringer

While they won't truly replace custom insoles, they do a great job of adding the right amount of support. You can choose between low, medium, and high arch support. They also help wick moisture away. But the part I love the most? I can use a medium in one shoe and a high in the other to accommodate my different arches.

So far so good

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size
  • Size Bought: 43

I'm a Sidi shoe guy, but the Sidi insole is almost non-existent. For years, I've used Specialized Body Geometry insoles with good luck, but decided I wanted to try something new this season and bought these.

So far, I'm impressed. Haven't had any problems adjusting so far, so I have high hopes.


  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size

I've been using stock insoles my whole life and these are a major upgrade. Coming from Sidi's basic foam, these offer a much better fit - a deeper heel pocket, nicer padding & the custom arch support is genius. I definitely recommend these!

Game changer

  • Familiarity: I've put it through the wringer
  • Fit: True to size

Had pain under the balls of my feet. Inserts make a huge difference and I wouldn't ride with out them. If you have arch issues, hotspots, etc. these will help a lot. Buy a pair for your MTB shoes too. Your feet will thank you.

Next best thing to custom insoles

    No bulk in the toe area, three different arch heights, and the ability to use a different height in each shoe if needed. Have not had a problem with overheating. A no-brainer.

    About Time

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: 42.5

    Finally, a shoe company that is thinking about one of the most important parts of the shoe…the footbed. These have been great for me since my arches are slightly different - I use the red on my right foot and the orange on my left. I hope other shoe companies will follow Giro’s path in paying more attention to the “whole product.”

    great value

    • Familiarity: I've put it through the wringer

    I've owned a few different Giro shoes and i like the customized fit of their insoles so much that I recommend them for customers. Solid buy.

    Great value

    • Familiarity: I've put it through the wringer

    I wear a SIDI wire vent shoe in size 43. The stock insoles do not accommodate my mid-rise arch. I have used the Specialized medium insole and found that to be better. The Giro insoles need less trimming to fit, at least for the SIDI 43 - just follow the line. Good support and I like being able to try the other arch options. They even come with an Extra high option that I have not seen with Specialized. Also provides the ability to have different arch heights if required for each foot. I have not ridden in extremely hot weather yet but so far no ventilation issues. I would purchase again and recommend others to try them, especially if you find your current insole lacking.

    Just what I needed

    • Familiarity: I've put it through the wringer

    For those of us with odd or problematic feet we search for relief from our various ailments. The particular benefits for me is the metatarsal button which relieves a painful spot under the ball of my right foot. And the interchangeable arch supports. I use a medium on the right and a small on the left. Finally being able to "tune" an insole has been great.

    Installation of these in my Bont Vapor shoes took 92 seconds of effort.

    Not sure if you have been to Podiatrist for your foot pain, but I recently went after have the same problem of pain in the ball of my foot and I was diagnose with a Morton's Neuroma. I am waiting to have surgery until riding season is over. I am going to try these insoles to get me through.

    Great alternative to Superfeet

      I have typically used black superfeets for insoles and they have worked well. I wanted more arch support than what was in the Superfeet, but I would have to compromise and get an insole that was thicker in the superfeet to have adequate arch support. With these, I can fine tune the arch support and still keep the thin insole.

      I also use Giro shoes, so it was a no brainer and fitting these insoles in their own shoes were perfect, not that trimming for other shoes would be an issue.

      Changing the arch support is easy and the velcro holds the support in place and doesn't move.

      I had foot pains with the stock insoles, but have had no pains during 15-20 mile mountain bike rides. Time will tell on how comfortable they are during longer rides, but initial impressions are great!

      Nice inserts

      • Familiarity: I've put it through the wringer

      I had to replace them when I threw my last pair in the dryer (bad idea, by the way). Nice insert to help keep me in the saddle for 100+ mile rides. These are quality inserts - highly recommended (even if they can't be dried).

      Worth every penny

        I have a pair of Fizik R3 shoes that fit quite well, but I was having foot pain on longer rides. My feet are pretty normal, if a touch wide, but my arches have gotten fairly high after a few years of wearing low-support/minimal shoes. I dropped these insoles in, with the highest-support attachment, since that's what I use in my Giro mountain shoes. I rode about 50 miles in them today, with virtually no foot pain.

        The arch-size inserts attach using a double velcro, and I've never had it slip in my mountain shoes, and don't expect it to in these. You can trim them to fit fairly easily by matching your shoes' insole to the Giro version, drawing a line, and getting after it with some scissors.

        Thanks for the great write up Brian. I need a good insole for sure.

        Hello, I am looking for foodbed for my...

        I am looking for foodbed for my boyfriend. His feet got hurt when he walks more often, especially at the heel. Do you think this product can help hm? Can this product fit inside every kind of shoes? He wear size 9, can you teld me what size of the foodbed I should buy

        Best Answer

        I use these.

        You have to take out the inner shoe sole that comes with the shoe to get them to fit. Most shoes you can easily remove them. Some are glued. These will help if you have plantae fasciaitis or other arch pain.