Thermo Flex Liners
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It's all about comfort, warmth and power transmission.
The original Custom liner. Do not settle for imitations. When it comes to liners, only ThermoFlex liners offer maximum warmth, total custom fit and rider tested performance.
Custom Fit to your foot and your shell for maximum protection against the elements. More comfortable than your bedroom slippers. Lighter than a box of Cheerios. If you want warm feet, this is better than walking across the campfire. The ability to play for more than one hour on the coldest day just got easier.
Now there’s Thermo Flex liners, the best thing to happen to feet in the snow sport industry! !
Works with orthodics, foot beds, even your smelly old ski socks! Almost any boot with a removable liner can take a moldable liner.
We recommend having these molded by a professional and your local boot shop. However, you can do them yourself with these instructions.
Features and Benefits:
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Custom Fit :Thermoflex ensures a 100% custom impression of your foot and a perfect link to the shell of
the boot for maximum performance and comfort. -
Remoldable: You can remold up to 6 times in case your feet change or you change boot shells.
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Lightweight: up to 60% lighter than a standard liner and 75% lighter than a foam liner.
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Comfort: Variable densities and thicknesses of EVA throughout the liner ensure incredible comfort.
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Ease of Use: You can mold them yourself or take them to your local shop for forming.
ThermoFlex Liners come in two models:
Speed Model: Designed for high cuff, generally 4 buckle boots. Firm material adds total rigidity to the boot and the heel cup area has been beefed up for maximum heel hold down power. The liner is a “wrap” design that gives most power to your boot shell. Speed Model
NT Model: Designed for low to medium cuff, 2 to 3 buckle boots. Medium density material for a comfortable feel and ride. The liner is a “tongue” configuration for maximum comfort and ease of boot entry. NT Model
How to determine which model is best for you:
Model types are determined by two things: height of liner and stiffness of liner.
Every boot has a height to it, measuring from the inside of the heel to the top of the boot. This height will be one determining factor in your selection. If you boot is low, you don't want a 12.5 inch liner sticking up out of it! On the other hand, if you have a tall boot you don't want a liner shorter than the shell itself. Please refer to the chart below.
Another thing to consider is the stiffness you want out of the liner. The NT model has a softer forward flex and softer liner overall. The Speed model is a stiffer, more rigid liner.
Mondo Size |
Speed Height Inches |
NT Height Inches |
M22 |
12.5 |
10.5 |
M23 |
12.5 |
10.5 |
M24 |
12.75 |
10.75 |
M25 |
12.75 |
11.0 |
M26 |
12.75 |
11.0 |
M27 |
13.0 |
11.5 |
M28 |
13.25 |
11.5 |
M29 |
13.5 |
12.0 |
M30 |
13.5 |
12.0 |
M31 |
13.5 |
12.0 |




