DIY Ski Boot Fit Guide
I want to prefact this by explicity saying what this guide is not. It is not a guide that will get you a professional boot fit at home. Neither will it teach you the skills to become a boot fitter. What this guide is meant for is the all too common situation where you have a pair of boots that are a bit too big, and they realistically are not worth investing any money into for a professional fit. People starting out with their friend's old gear, ex-rental boots, or even just really packed out boots that you want to squeeze another season out of are the real target here.
Why Boot Fitting Matters
Your boots are your connection to your skis. Poor fit can lead to discomfort, pain, lack of control, and a general bad impression of skiing which sucks.
Pro Tip: Well-fit boots last a long time for the average recreational skier. If you're going to buy new boots, it's worth budgeting for.
Supplies
Luckily, this is a pretty quick and cheap process so you don't have to invest much in this. Make some tweaks and if you don't like them there's no harm done.
| Supply |
Purpose |
Cost |
| Heat Gun or Hair Dryer (Optional) |
Helps adhere foam and tape |
$0 I would not buy a hair dryer for the project but if you have one there's no harm bringing it out |
| Adhesive backed Foam |
This is the medium you'll be working with |
$1-$2 |
| Foam |
I grab some non adhesive foam as well for insoles |
$1-$2 |
| Utility Knife |
Trims foam and liners |
$1-$2 |
| Ski Socks |
Proper test fitting |
$0 Whatever socks you ski in are fine |
| Duct Tape |
To secure foam |
$2 |
Tip: Don't overthink this. There's almost no chance you screw something up irreversibly, and it's all trial and error. Just hit up Michaels for some foam and make sure your knife is SHARP.
How to Fit Your Boots
1Put on your socks and your boots
- Put on your ski socks
- Step into your boots and tighten them as usual. Make a note if any buckles are maxed out or on the absolute minimum.
- Walk around a bit and get a feel for where they feel loose
- Now that you know what's loose, step out of the boots (you can leave the liners in if you're starting with insoles)
2Custom Insoles & Foam
- If you have too much volume in general, and not in any specific area then I like to add a basic insole
- Remove the existing footbed from the liner
- Trace your footbed onto the foam (use whatever thickness you think will be right)
- Cut the foam along your tracing
- Put the foam into the liner and then the footbed on top
- Test fit and adjust as needed. If you find that your thinnest foam is still adding too much volume, then take it out and only follow the steps below
3Liner Customization
- This is unfortunately where it becomes a lot more art than science so you'll forgive me for being imprecise
- Take your liners out of the boots
- Get out your adhesive foam and start cutting shapes that will fill the areas you felt were loose on the boot. You can look up bootfitting foam for inspiration, but really I've found it ends up being quite custom
- Start with one section at a time, add it to the boot using the adhesive (heat can help it bond, don't do this until you want to finalize it. The foam can still come off but it leaves a goop)
- See how they feel after each iteration. Once you're happy with the fit take the liners out one last time and use duct tape to secure the foam. I find the duct tape makes it less likely for the edge of the foam to catch when you take the liners out (which you should be doing after each ski day!) You can use heat to help bind the adhesive on the foam and the tape, but it isn't necessary
4Ski!
- Take it easy the first time you're out with the adjustments as they won't be the same as before
- If it's a bit tight, remember that it will also pack down a bit
- If it's unbearable just take the liners out and rip the foam off. Don't let it ruin your day.
- Repeat process as necessary to dial in the fit
Boot Care
Now that you've spent the time and maybe even $5 to fit your boots, you'll want to make sure you take care of them
- Shell: Buckles on the loosest setting, but done up. Wipe them down every once in a while too as they can get pretty gross
- Liners: Out of the shell to dry (a boot drier can help if you're skiing as often as I dream of)
Final Tips for Success
- Take your time: There's some trial and error involved
- Start conservative: You were already skiing on too loose boots, so take it in steps instead of trying to get a total performance fit the first time around
- First run is a green run: Better you test out your tweaks on an easy run first. If they feel good, enjoy the rest of your day
- Perfect is the enemy of good: This process won't get you a perfect fit, but it will make your fit better. Isn't that all you can ask for for less than the price of a coffee at the lodge?