Design: Toggle system uses an easy pull-and-release closure so you can quickly tighten these shoes with one hand Added puffs to the heel that are visible on the outside of the shoe and immensely comfortable around your Achilles on the inside Touch points at the tongue create a natural feel as you take off Foam midsole delivers a softer, smoother ride than the Revolution 6 There is a little more room in the forefoot as well, so your toes don’t feel cinched or pinched Durability & Traction: The outsole sports a generative traction pattern that combines with reassuring rubber lugs gives you grip when going uphill or downhill