This is the most comfortable and softest step I have ever tried. They really help hit my knees as it feels like walking on soft carpet when actually walking on a sidewalk. BUT. It has a price tag, pictures show wear and tear after only 3 days of walking my dog, only pavement. As if the material is too soft and wears out with normal walking. I know they won't last very long but as long as they last they reduce the impact on my knee joints. Also, buy half a size larger than usual.