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THE TRI-FLEX MIDSOLE®

The Tri-Flex® midsole with a Warrior Boot

The original Tri-Flex® drawings

The midsole has a graded thickness throughout its length to achieve maximum foot support and optimum flex

The Tri-Flex® midsole ready for use

The midsole is located between the sole and the foot. It controls the flex of the boot.

THE OPTIMUM COMBINATIONS OF
TOE SPRING ~ SUPPORT ~ FLEX
A midsole that matches the seasons and the terrain.

THE TRI-FLEX® MIDSOLE IS AN ALT-BERG DESIGN and is only used in Alt-Berg boots.

All boots are built on the midsole - it is the foundation of the boot. The midsole controls the underfoot support...the toe spring...and the flex of the boot.

The Tri-Flex® Midsole uses a unique 3-dimensional insole design with an N.C. controlled polymer nylon mix to achieve the optimum flex for different categories of boots.

Good bootmaking starts with the midsole - customers can't see it, it is built into the boot - but it is the most important component of the boot and it makes a huge difference to how the boot feels and performs in wear.

Back

We were developing a new walking boot, "Tethera", and I became unhappy with the felx and support of all the midsoles available on the open market. I had trialled over twenty and none of them gave me exactly the right mixture of flex, toe spring and rough terrain support that I was looking for.
So I went to see one of the leading manufacturers of nylon polymer midsoles in Europe and for almost one year we tried various combinations of designs and polymer mixes.
Eventually I found the ideal combination of design that I could use with a varying polymer mix. I settled on three levels of flex and during the development stage we called the midsole the 'Three Flex Midsole'. It was very quickly shortened to 'Tri-Flex'...so when the midsole was completed that's what we called it...
The Tri-Flex® midsole.

THE TRI-FLEX MIDSOLE®