First of all, these are NOT Gray. The color is an attractive goldish-beige that goes well with all colors and styles: slacks, jeans, skirts and dresses. The color is lovely.
I am thrilled to have a pair of sandals that are reasonably priced AND made of leather. The heel provides a nice lift, the front portion is adequately cushioned so that walking and standing is exceedingly comfy. Wrap your foot into place by adjusting the velcro strap. Easy to put on and take off.
I stand in these all day long as a teacher. There is only a slight sense of possible instability--I have to be mindful when walking on stairs or on unstable surfaces. I think I prefer zipper backed sandals.