I bought this as a shoe solely for a home treadmill. The first time I wore less than 5 minutes because. The insole is about as comfortable as concrete, but with less support. You can get the same feeling in shoes you already have by removing the insoles and simply walking on the hard plastic. From the outside the shoes look like they have a thick sole due to the color of the plastic, but if you measure the inside versus the outside you can see that the insole is tucked deep into the bottom of the shoe and the pad is on hunk. fabrics.