Here is some information about the Treks from Vibram:
The Men’s KSO Trek is a more rugged version of our popular KSO. The Kangaroo leather upper and sock liner are soft against the foot, yet strong and tear resistant, with outstanding breathability.
A 4mm EVA midsole offers plating protection from stone bruising, and a lightly cleated 4mm Vibram performance rubber outsole delivers improved traction on trails and over more rugged terrain.KSO Trek is best for: Light Trekking, Trail Running, Fitness Walking, & Travel.
Here is some information from the Vibram website about the shoes:
The typical human foot is an anatomical marvel of evolution with 26 bones, 33 muscles and hundreds of sensory receptors, tendons and ligaments. Like the rest of the body, to keep our feet healthy, they need to be stimulated and exercised.
That’s why we recommend wearing FiveFingers for exercise, play, and for fun. Stimulating the muscles in your feet and lower legs will not only make you stronger and healthier, it improves your balance, agility and proprioception.
When we first introduced Vibram FiveFingers® to the world, it was the beginning of a revolution.For the first time, active outdoor athletes and fitness professionals were able to experience the sensation and freedom of going barefoot with the protection and sure-footed grip of a Vibram sole.
Their response exceeded our wildest expectations.Some customers told us they felt more connected to the earth and more in tune with their bodies. Others discovered an increased sense of balance and greater agility. And many reported health benefits like improved posture and less back pain. All were generous with their praise and their ideas, often suggesting new and creative uses for FiveFingers.
With the new 2009 Vibram FiveFingers collection, our patented barefooting concept continues to evolve.
Now you can choose from a variety of designs to cover the wide range of activities you would rather do barefoot; everything from fitness training and yoga, to running and trekking, to kayaking and sailing.
Clearly, the barefooting revolution is alive and well.