Heaven Step Gel Sole Air Comfort. Heel to Toe comfort. Superior heel to toe comfort in one complete sole, absorbing and cushioning shock to knees and leg joints. Pressure relief all day long. Polymer gel is revolutionary and lightweight giving the wearer the feeling of air comfort. Invisible slim line discreet gel sole will not detract from the elegance of your footwear. Sticks, non-slip giving you the assurance that this foot aid will not move even with the most vigorous activity and therefore can confidently be used with sandals and footwear without straps.