Description The key to the comfort and stability of AKU boots is their IMS system. Normally the midsole (the boots backbone) is made from a flat stiff board or plate, but IMS uses a 3D anatomically shaped midsole that cradles the foot in a natural position reducing internal movement and encouraging a naturally relaxed foot. What this means is that your feet feel less tired as they are not constantly working to provide support, the IMS is doing all that. The sole unit of the Superalp has been constructed using the new Exoskeleton construction which provides protection and stability without compromising the weight of the boot. The Exoskeleton is made up of a softer material to absorb impact shock and a more rigid material to provide stability, lateral retention and the perfect torsional rigidity. A Vibram self-cleaning outer sole supplies oodles of grip on a loose ground and has a reinforced toe area for secure grip on rock, if you fancy a bit of scrambling. The Nubuk leather is supplied by an Italian tannery that guarantees a sustainable and environmentally friendly production process resulting in the best quality 2.6mm leather. These sublime leather uppers are then backed by a 3D Gore-Tex lining for complete waterproofing and breathability. Stretch zones have been built into the ankle area to allow full movement without compromising support. In fact your ankle is superbly protected and cossetted by padding which becomes apparent as you slide your foot in. A full rubber rand finishes off the uppers to provide abrasion resistance. An even lacing tension is guaranteed by the use of roller eyelets that allow a smooth lace pull from the toe to the ankle, and you can separate the upper and lower lacing tension with a 45 degree lace lock. I really cannot convey in words how fantastically comfortable these boots are, your feet feel completely relaxed and cosseted, yet secure and stable at all times. Nubuk leather uppers Gore-Tex lining Flex zones Padded ankle IMS midsole Exoskeleton support system Vibram sole unit