I am on my feet 75% of my work day, on concrete no less. These were the first Zigs I purchased. Not long after trying these I picked up a pair of the Zig Actives. The Dynamic runners are much tighter in the toe box but like all shoes of this type they will contour to your feet after a few wears. I like these more than the Actives, they have more support throughout the entire shoe. The Actives seem like a more casual shoe whereas the Dynamics are ready for action. I am happy with both purchases and if I had one small complaint it would be the "Zig" (sole) material is a little too stiff. My Soucony Grid Nitros absorbed impacts much better than both of these.