Sizing Chart

What the Heck is "Mondo"?

The size of your liners will be determined by the size of your boots. If you have Mondo sized boots, the liners will be the same size. If you do not have Mondo sized boots, you will need to know this size.

To find your Mondo size, place your foot on a piece of paper and mark your longest toe and heel. Make sure you are using your longest foot (if you don't know, measure both of them). Measure this distance in Centimeters (inches X 2.54). Round down to the nearest whole size. This is your Mondo size. If you are right on the border for sizing (in other words, if you measure EXACTLY a 27, then measure your foot again plus measure the other foot to see what size will be the best for you). Also see Shell Test to make sure you have the right size boot shell.

It will be one of the following sizes:

22
23
24
25
26
27
28
29
30
31

Please do not convert your American (or European) street shoe size to Mondo. Street shoes are NOT a performance shoe, and are not always the correct size. Use the method above for an accurate sizing.

What to expect:

When you first get your Thermo Flex liners and put them on your feet, they WILL BE UNCOMFORTABLE!!! This is because they are not molded to your foot, they are designed to some generic form. Also, they will be hard and will probably poke and prod your feet in places that feel strange to you. You must heat the liner to mold it to your foot - we suggest that you take this to a professional.

PLEASE SEE THE "SHELL TEST" FOR MORE INFO ON HAVING THE RIGHT SIZE SHELL AND LINER!!!!!!

Once you have determined that you have the right shell, then order the liner that corresponds to the shell size. You should not order a liner that is a different size than the shell!

These liners are not designed only for ski/snowboard boots. They can be used in many applications, such as snowmobiling, dog sledding, soft snowboard boots, hard snowboard boots, tele boots, ice climbing, snow shoeing, etc. - almost any boot than has a removable liner can take a moldable liner. If you want a warm, lightweight liner, this is the one for you!

Custom Fit
Lightweight in comparison to other liners
Much Warmer than conventional liners because it molds to your foot - no dead air spaces
Moldable up to 6 times

The liners need to be heated to form to your feet. We strongly suggest taking your liners and boots to a professional! This could be a ski shop, boot fitter, or anyone who has a special Thermo Flex/Moldable liner oven. Reason: the oven is specially designed to only heat to a certain degree, and is timed so as to not over heat the liners. Also, there are certain other things that the professional will put on your foot in order to make your liners fit as best as possible. Usually, a ski shop will either not charge the customer or for a very nominal fee they will mold your liners for you. This is highly recommended. If you would like to try them yourself, please see the "do it yourself and pray" section.