The level of rigidity of a boot depends mainly on its midsole.
We use six different Bestflex midsoles made from different materials, giving our boots five different levels of rigidity and flexibility, each ideal for its intended use.
The midsoles marked with a ‘+ P®’ are aditionally lined with PORON® Performance, which gives the boot a high energy return and excellent impact absorption for the complete life of the boo (for more information, see: PORON® Performance)
In the latest generation of our mountaineering boots we have lined the midsole with PORON® Performance, which gives the boots unbeatable levels of
To use PORON® cellular urethanes for this purpose is a natural choice in our product policy, as it offers more shock absorption than any other known material, and also resists the tendency of other insole materials to bottom out and take a permanent compression set. This results in maximum comfort for the life of the shoe.