Better for Dress shoes, than black Superfeet
The Blue Superfeet have less arch support than the green, but also makes them better when you need to put them in a slim shoe such as dress shoes. I actually got these for putting in cowboy boots that had no support and now they feel great! I tried my existing pair of green Superfeet in the boots first but that added too much volume so the blue was the way to go. The black Superfeet are also listed as being for dress shotes but they have a cleat like bottom that would have damaged the insides of my boots so again, blue.