Powerstep SlimTech orthotic arch supports 3/4 Length by Stable Step Inc. are one of the only over the counter orthotic arch supports available that are designed by a podiatrist. In fact, Powerstep SlimTech orthotic arch supports 3/4 Length are not only designed by a podiatrist but the arch support shape itself was created through a detailed computer analysis of the castings from hundreds of actual people’s feet. This design process resulted in an amazingly supportive, semi rigid, prescription-like orthotic arch support that retains just enough flexibility for an unparalleled level of comfort. Due to this unique design process, Powerstep SlimTech 3/4 orthotic arch supports accommodate and support a wider range of different foot types and arch heights then many other over-the-counter arch supports. For this reason they have a return rate of less than one half of one percent!